Yes Tor usage by default is trivial to detect because the list of Tor nodes your client connects to is public. The EFF has a nice interactive graphic that shows what different actors see if you use Tor [0] You can make that harder to detect by using a bridge. https://bridges.torproject.org/
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Yes Tor usage by default is trivial to detect because the list of Tor nodes your client connects to is public. The EFF has a nice interactive graphic that shows what different actors see if you use Tor [0] You can make that harder to detect by using a bridge. https://bridges.torproject.org/
[0] https://www.eff.org/de/pages/tor-and-https