Can UDP:10000 and TCP:443 *both* be used?

STUN_MAPPING_HARVESTER_ADDRESSES is used once when the bridge is started to discover its public address. The way stun works, you cannot use a stun server from the same network, so you cannot use your stun server if it is in same network.
If you want to avoid using STUN_MAPPING_HARVESTER_ADDRESSES and our stun service you can setup public and private address manually using:

org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=<Local.IP.Address>
org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=<Public.IP.Address>
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Ah, excellent! Thank you so much @damencho