If you solo mine and actually solve a block, does it make sense to have a large amount of inbound connections configured?  Or is the only concern outbound connections?

The idea being if you actually solve a block, you need/want to tell the bitcoin blockchain world about it as quickly as possible before another miner solves a block within seconds of you.

For example, how would a large pool handle their inbound and outbound connections?  On Bitcoind 0.21.0, if you are nat'd behind a router, you can only initiate connections outbound to the world and I believe on this version the max is 10 outbound.  But if you open port 8333 on your router, you will start seeing inbound that exceed 10, so far I am seeing 25.

But which is more important for broadcasting to the world, outbound?  Is the only advantage of inbound to run a node for others to sync their blockchain databases?

Thanks