My domain name provider doesn't allow CAA records in their DNS editor for some reason. When I mailed them about it they said I could just use a TXT record instead. After a good hour of Googling this appears to have been incorrect. I can't find any information about using a TXT record for this. I have even skimmed through the RFC and I can't find any mention of TXT records.
Is a TXT record commonly supported for CAA, or was my domain name provider straight up wrong about that?