They allow QBittorrent. https://wiki.torrentleech.org/doku.php/about_clients?s[]=clients
The following clients are banned from Torrentleech
Thunderbolt (a.k.a Xunlei) FOLX download manager Freebox BitTorrent BiglyBT Some versions of μTorrent (mainly older than the 2.2.0 version for Windows) Bitcomet
We also do not permit beta clients, or clients which have been forked from major clients and/or altered in some way.
Get Windscribe for $3 a month and setup gluetun and you're golden