Thank you. This is helpful, especially the tags affected, the Geo-Restrictions tab, and the link to the petition.
I would add that the OSA bans not only porn but also "content that encourages, promotes, or provides instructions for either: self-harm, eating disorders or suicide". How one differentiates between "mentions" and "promotes" is not obvious. https://www.gov.uk/government/publications/online-safety-act-explainer/online-safety-act-explainer#types-of-content-the-act-tackles .
While I do hope that this act will be repealed, I believe the users should be ready to work around it in the meantime.