The Silicon Labs Multiprotocol Add-on provided by Home Assistant hasn’t been updated for a long time, and was offically deprecated 3 days ago.
If you still want to try Multiprotocol, you can use the Silicon Labs Multiprotocol Add-on provided by iHost Open Source Project.
There are posts in this forum discussing how to use Multiprotocol, please refer to Matter over Thread with ZigBeeToMQTT and SonOff ZBDongle-E V.2 for details.