Let's assume that one has some modern HP printer and/or scanner which is not supported by HPLIP package from official repository.
Currently Ubuntu versions have the following versions in universe pocket:
bionic (18.04LTS): 3.17.10+repack0-5 focal (20.04LTS): 3.20.3+dfsg0-2 impish (21.10): 3.21.6+dfsg0-0ubuntu1
What can one do if printer is supported in newer version of HPLIP (checked this in HP Developer Portal | All Supported Printer Models)?