How to add Windows 10 to GRUB menu, when missing after Focal install and boot-repair?

I have installed Focal (dual boot, Windows 10 was already installed), and the GRUB menu lists only Ubuntu, no Windows, which was customary on my PC also with previous Ubuntu releases. With previous releases, however, running boot-repair would fix the issue, but not this time.

Oddly enough, when I see the GRUB menu if I:

• hit [Esc] to enter the GRUB CLI
• type exit to leave the GRUB CLI

then the system boots straight into Windows 10.

I have also run sudo grub-update but no change.

Under Windows 10, I have run bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi but no change. I noticed that under C:\Windows\Boot\EFI there is no ubuntu directory, and can't find a shimx64.efi in there.

In the motherboard UEFI I can choose two other entries to boot from, but one behaves the same, and the other boots straight into Windows 10, with no GRUB menu.

This is a pastebin with the report from boot-repair https://paste.ubuntu.com/p/6ZHvQqSfMN/

Here below the /etc/default/grub

Any other information I can collect to troubleshoot the issue?

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

[Additional info] I have two SSDs configured as RAID 0 with Intel RST. On that RAID, I have both Windows 10 and Ubuntu 20.04. See pic below. In the UEFI BIOS, Sata mode selection is set to RAID, no AHCI.

After removing the boot entry as per oldfred recommendation (with efibootmgr), the PC booted directly into Windows 10, without showing the GRUB menu anymore. From there, I modified the boot entries again to regain access to Ubuntu; I also tried running boot-repair one more time, this is the current status:

$ sudo efibootmgr -v
BootCurrent: 000E
Timeout: 1 seconds
BootOrder: 000E,0000,0007,0004,0009,0001
Boot0000* Windows Boot Manager  HD(2,GPT,baeb537c-b470-48ab-ae4c-4663a62e8d2a,0x109000,0x32000)/File(\EFI\ubuntu\shimx64.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...,................
Boot0001* CD/DVD Drive  BBS(CDROM,,0x0)AMGOAMNO........o.H.L.-.D.T.-.S.T. .D.V.D.R.A.M. .G.H.2.2.N.S.7.0....................A...........................>..Gd-.;.A..MQ..L.2.K.B.Z.9.8.5.8.2.5. .9. . . . . . . . ......AMBO
Boot0004* ST31000524AS  BBS(HD,,0x0)AMGOAMNO........m.A.0.S.0. .T.O.S.H.I.B.A. .H.D.W.D.1.2.0.........................rN.D+..,.\...........>..Gd-.;.A..MQ..L.A.0.S.0. .T.O.S.H.I.B.A. .H.D.W.D.1.2.0......AMBOAMNO........g.A.0.S.1. .S.T.3.1.0.0.0.5.2.4.A.S.........................rN.D+..,.\...........8..Gd-.;.A..MQ..L.A.0.S.1. .S.T.3.1.0.0.0.5.2.4.A.S......AMBOAMNO........_.I.n.t.e.l. .V.o.l.u.m.e.0.........................rN.D+..,.\...........0..Gd-.;.A..MQ..L.I.n.t.e.l. .V.o.l.u.m.e.0......AMBO
Boot0007* Windows Boot Manager  HD(2,GPT,baeb537c-b470-48ab-ae4c-4663a62e8d2a,0x109000,0x32000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)
Boot0009* Removable Drive   BBS(Floppy,,0x0)AMGOAMNO..........G.e.n.e.r.i.c. .M.a.s.s.S.t.o.r.a.g.e.C.l.a.s.s.1.5.3.6....................A.....................................N..Gd-.;.A..MQ..L.G.e.n.e.r.i.c. .M.a.s.s.S.t.o.r.a.g.e.C.l.a.s.s.1.5.3.6......AMBOAMNO..........G.e.n.e.r.i.c. .M.a.s.s.S.t.o.r.a.g.e.C.l.a.s.s.1.5.3.6....................A.............................N..Gd-.;.A..MQ..L.G.e.n.e.r.i.c. .M.a.s.s.S.t.o.r.a.g.e.C.l.a.s.s.1.5.3.6......AMBO
Boot000E* ubuntu    HD(2,GPT,baeb537c-b470-48ab-ae4c-4663a62e8d2a,0x109000,0x32000)/File(EFI\Ubuntu\grubx64.efi)