Yeah, you need to get some incoming peers on mainnet (or any network), before you’ll get the transactions flowing. p2p should be announcing your presence based on your registered pool cert relay. But it can take a while.
There are still people using topology updater, so you need to make sure you are running the topology updater script (just the announce part, you don’t need to use the topology pull script to update your topology json, as you’re running p2p).
You could also get a few other pools to manually add your relay to their topology and get a few connections that way.