The same question was archived on r/trackers. Would like to get notified when a compatible tracker is available for testing, it’s not even clear if there is an implementation just yet.
The specs are here since 2017 https://www.bittorrent.org/beps/bep_0052.html
Compatible clients are available, at least qBittorrent (from v4.4.0) and BiglyBT.
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All site admins would need to do is increase the torrent hash length in the tracker, if it is a new tracker site. I actually recommended to use bittorrent v2 to the fappaizuri guys when they started it. The response was: Well, it works with v1 as well, soo ¯\(ツ)/¯