Change the PHP version error but on PHP version of 7.3.20

I get this error even though RHEL shows PHP version of 7.3.20. What am I missing?

Advice for developers and administrators:
Change the PHP version to one supported by your version of Kirby

Kirby 3 requires PHP 7.4, 8.0 or 8.1

Could have sworn I had it running on this version at one point. Looks like updating I will go.