A generic search for linux driver MT7921E show the hardware as a challenge.
And forum topics
→ Search results for 'mt7921e order:latest' - Manjaro Linux Forum
The only package I could locate with AUR is the mt76-dkms-git (upstream GitHub - openwrt/mt76: mac80211 driver for MediaTek MT76x0e, MT76x2e, MT7603, MT7615, MT7628 and MT7688)
→ [root tip] [How To] Kernel - Headers - DKMS
→ [Need-To-Know] About Manjaro and AUR
//EDIT: 2025-06-05T06:02:00Z
The linux hardware database is just confirming this specific hardware id to be a real challenge as it is not working for any of the distributions in the database.
You may also try sync the Linux 6.15 kernel and reboot to learn if the specific card has been added to the in-kernel drivers.
sudo mhwd-kernel -i linux615
For mobility - this is a real issue - the only way is to hunt down a USB dongle device known to work with Linux.
There is github page assembling information GitHub - morrownr/USB-WiFi: USB WiFi Adapter Information for Linux
https://alfa-network.eu/wi-fi/kali-linux-compatible
The following https://alfa-network.eu/wi-fi/kali-linux-compatible/awus036acs is known to work OOB with Manjaro with Linux 6.15