Welcome to the Manjaro community @rolliebae
A quick search of the forum reveals quite a few topics about the MT7902 wifi card: Search results for ‘MT7902’ - Manjaro Linux Forum
Unfortunately, as I mentioned in another reply a fortnight ago, it seems that there is no Linux support for the MediaTek 7902 card, and by the looks of it, MediaTek are in no rush to provide Linux support:
As suggested in the linked above topics, your best bet might be to get a WiFi dongle for use when running Linux on your laptop, or to replace the card inside the laptop with one that is Linux-compatible.
The Hardware for Linux site can be very useful for checking hardware compatibility - here’s the main report for your card: MediaTek Wi-Fi 6E MT7902 Wireless Network Adapter. Some other Hardware for Linux reports for that type of card can be found at: Results for id=‘14c3-7902’ (7)