GNU/Linux Ubuntu 22.04 Installing MediaTek MT7612u/MT7612un Driver Guide
Hi! This tutorial will guide you step-by-step on How to Install Ralink/MediaTek MT7612u/MT7612un Wireless Driver for Ubuntu 22.04 Jammy LTS GNU/Linux.
And to make use of the Latest MediaTek MT76 Driver on Ubuntu 22.04 it’s enough to dispose of an Updated Linux Kernel.
After a Kernel Upgrade, it is Strongly Recommended to Immediately Proceed with a Firmware Update to Ensure Hardware Compatibility and Optimal Performance. Follow this Guide: How to Update Linux Firmware on GNU/Linux Distros.
Especially relevant: this Driver is supplied from Linux 4.19 but some important Connection Issues has been fixed only starting from the 5.4.1 Kernel release.
Again some of the Latest MediaTek Chipsets are supported only in a range of New Kernels. So Check the List here below for more insight!

How to Update MediaTek MT7612u/MT7612un Driver for Ubuntu 22.04