Leave port at 25565 unless the server explicitly uses a non-standard one. The poller resolves _minecraft._tcp.<host> SRV records first, so most domains route to the right host:port automatically.
_minecraft._tcp.<host>
Bedrock pings go through api.mcsrvstat.us since Cloudflare Workers can't speak UDP. Set port to 19132 for Bedrock with a non-standard address.
Use auto for normal stores. Override when the store is bot-protected and detection can't reach it.