[2023] Uhhh that's disappointing

Each MOM pack has the normal rare/mythic slot (which pulls only from MOM) and an additional slot that pulls from the bonus sheet (which can be uncommon/rare/mythic). Your collection should show you still have 50 rare/mythic MOM cards

You should always have one regular March of the Machine rare or mythic, and possibly a Multiverse Legends one as well, it just may not have been displayed to you.

If you are opening multiple packs at a time, the client will only show one rare/mythic per pack, even if the pack has more than that.