Hello,
I have installed rc1, but no luck - still seeing same driver issue in dmesg, hence only radio0 (MediaTek MT7622 802.11bgn) is showing in Luci.
Then i downloaded https://github.com/openwrt/mt76/blob/master/firmware/mt7915_eeprom.bin and reloaded the kernel module:
cp /tmp/mt7915_eeprom.bin /lib/firmware/mediatek/
rmmod /lib/modules/5.10.111/mt7915e.ko
insmod mt7915e
dmesg | tail
[ 15.904365] mt7530 mdio-bus:00 lan1: Link is Up - 1Gbps/Full - flow control rx/tx
[ 15.911899] br-lan: port 1(lan1) entered blocking state
[ 15.917133] br-lan: port 1(lan1) entered forwarding state
[ 168.750758] mt7915e 0000:01:00.0: assign IRQ: got 140
[ 168.755934] mt7915e 0000:01:00.0: enabling bus mastering
[ 168.897953] mt7915e 0000:01:00.0: HW/SW Version: 0x8a108a10, Build Time: 20201105222230a
[ 168.897953]
[ 168.915727] mt7915e 0000:01:00.0: WM Firmware Version: ____000000, Build Time: 20201105222304
[ 168.939571] mt7915e 0000:01:00.0: WA Firmware Version: DEV_000000, Build Time: 20201105222323
[ 169.053709] mt7915e 0000:01:00.0: eeprom load fail, use default bin
Now i have also radio1 (MediaTek MT7915E 802.11nacax) in Luci!