Check if a card exists in Game Type?

{"ops":[{"insert":"Maybe I'm missing how to do this, but I created a commander deck in paper recently and wanted to start building it in MTG Arena as a Historic Brawl deck (now I guess it's just Brawl? I digress). I created a copy and labeled it \"Historic Brawl\" and then changed the game type to \"Arena\" and then saved and re-loaded to be safe. However, I was hoping that any cards that don't show up in Arena would be flagged with an error and none are being complained about, even though there are cards I know aren't available (such as cards from the Dr. Who Commander sets, among others). Is this something that should be happening? And if not, is it reasonable to ask that it can be added as a feature? It would be extremely useful to know what I can play with, and even more so when trying to import the deck to Arena since it will complain about a single card and then void the whole import, regardless of how many other cards are valid/invalid.\n\nTLDR; It seems like marking a deck as \"Arena\" Game Type doesn't error out on cards that are not available in Arena. Is there a way this could be added as a feature? It would be a really helpful feature, especially with exporting/importing between Arena and here.\n"}]}