Return Anchors (Multiplayer Home Teleport) Add-on 1.21+

The Respawn Anchor once became a very useful thing, helping to quickly return to the desired location in the Nether after death. Previously, death in the Nether was a catastrophe since it required traveling hundreds of blocks to the needed place. Now Minecraft will also feature a Return Anchor. By placing this block, you can return to it at any time. This feature is available with the mod Return Anchors (Multiplayer Home Teleport).

First, you need to craft all the necessary items.

Then you must set the spawn point.