soundcore life p2: mic not working in phone calls - android

So, as it says, the mic is not working in phone calls on my android Xiaomi Poco X3 NFC (MIUI version global 12.0.8).
Tried all the usual fixes (resetting earphones, clear bluetooth cache, unpair/pair etc.) but nothing seems to work. No option i can find to ‘enable’ mic in the settings on the Poco, and it seems to have all the relevant permissions granted…
Wondering if this is some kind a issue/bug?