Frank-Starr
flatpak for the clamav but I warn you it's a stinker of a program. It will come up with 1000 vulnerabilities and 998 of them will be with Libre Office and after 998 false positives you might have a PUP or something. Just awful. I try it once a year for giggles and it never gets any better.
Did you flatpak search maldet
or DDG 'maldet appimage' or similar? Or Snap?