Missing cards

I just started cataloguing my collection, and I'm only a couple dozen cards in and already finding several cards not listed.  Should I go to another site for this?  Cuz it's a pretty bad sign when I've barely started on this and can't find simple cards like 2020 stadium club chrome 164 refractor (Pete Alonso) or 2020 Stadium Club PZ-24 (Power Zone 24, Yordan Alvarez) and also none of the red/blue/ black variants, etc.  Maybe I'm doing something wrong.  Please advise.