The only 'steering clear' I'm aware of Sioned Williams doing is avoiding engaging with lesbians and other women and constituents who have contacted her on this issue. She used to reply with dismissive, standard TWAW replies, but for the last couple of years I've only heard of women getting absolutely no reply at all.
If you google her name+trans, search her X or Insta you can see that she's posted extensively on 'trans rights', and also denigrated women (and men) who have raised concerns. She posts videos with 'My pronouns are SHE/HER' in large font at the top and recognises every trans-related awareness day or development. She hosted Pink News receptions at the Senedd, and I'm sure if you searched Y Cofnod you'd find plenty she's said in the Siambr. I don't know whether she's so militant because she's gullible and naive, or if her internalised misogyny is so ingrained that she automatically thinks the worst of women (especially older lesbians) and will therefore believe young activists whose belief system has no basis in material reality. She's known to have actively discouraged fellow MSs from attending events organised by women's groups because they are sex-realist and according to her therefore transphobic.
I'm not a Plaid insider, but I have often voted for them and I've talked to a lot of insiders (or ex-insiders because some have resigned over this). Sian Gwenllian is apparently just as unwilling to entertain any other possible point of view and a few of those elected for the first time also have form.
Anyone who was a Plaid candidate in the 2021 Senedd elections has had compulsory training from Gendered Intelligence of all people. When WRNers asked Becca Martin do you believe that women deserve single sex-based spaces she answered "No". Anothr new north Wales MS, Beca Brown travelled a considerable distance to attend a demonstration against the Supreme Court judgment and gave quotes to the press about it. Any harassment or victimisation of these women is obviously unacceptable, but they seem to have a very tenuous grasp of equality law and evidence. When Plaid Cymru were asked by Merched Cymru for comments on their views on women's rights and the SC judgment back in March, the reply from the Chief of Staff switched to talking about trans rights in the middle of the first sentence. It was woeful.
Will they suddenly set aside what appear to be very strong, one-sided personal convictions that not giving vulnerable minorities exactly what they demand - no matter the consequence to themselves or other protected groups - is 'hateful'? Or will they take a deep breath and think critically?