Waypoints - Minecraft Plugin
Always find your way back home with SMP friendly server-side waypoints
modrinth.com
Waypoints is a plugin something a player can earn/buy that will allow them to place a single anchor in their base. From that anchor they can teleport to any already discovered anchors. My suggestion would be for this to be something that the community as a whole can unlock after they have completed the Nether Hub/Tunnels.
As for using these waypoints my biggest issue with is that it could make the Nether Hub completely useless. In counter my biggest issue with the Nether Hub has always been travel time, especially if you forgot just one thing. My compromise for this would be that each player gets 2 free teleports every hour. They don't stack so you can have a max of 2 teleports. This will allow for a roundtrip to any destination with another Anchor. If player want to abuse the teleporting they can pay for that with in-game currency.
Personally I would love this because it gives you the convenience of being able to do 1 quick round trip if you forget something, but for any other travel needs you still have the Nether Hub to get to places quickly.