It's not HodlHodl that is barring US residents from using it. It's US government forbiding its loyal citizens from using HodlHodl.
10 sats \ 0 replies \ @mf 26 Feb
If there's a will, there's a way.
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It's not banned in the USA.
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Was about to correct you ...
then I see the Terms of Service that is currently linked from the website, and it no longer says U.S. is banned!!
Current:
Nothing about any restrictions regarding any countries :
Old (which is still accessible):
By using Hodlex Ltd Services, you further represent and warrant that:
  • [...]
  • you are not a citizen or tax resident of the United States of America (except if You are using Lend at Hodl Hodl), North Korea, Iraq, Syria, and/or Sudan;
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Ok. They may have updated this. I was kicked off in July 2022 because they said I was in the U.S.
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U.S. residents are in fact blocked from using HodlHodl. I just contacted them. Below is their response.

Hello, Thank you for contacting us. Unfortunately, Hodl Hodl trading platform is not available for US citizens or tax residents, you can read it in our ToS https://accounts.hodlhodl.com/pages/terms_of_service. Only Lend Hodl Hodl (lend.hodlhodl.com) is available in US. Please feel free to contact us again if there is anything more we can help with. Best regards, Hodl Hodl team.
If you attempt to use the platform and they find out (ie. someone reports you) they will simply shut down your account. I was shocked, but this is what happened to me.
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It's not banned in the US.