I can't read beyond the one tweet, or access the posters bio but this is their website: https://the-pha.org/ https://twitter.com/user/status/1678323029284118528
It looks like a 'wellness' website with emphasis on a mix of general healthy living stuff like diet, exercise, sleep, avoiding stress etc, along with the usual mix of meditation, yoga etc. The stuff in the tweet about ME/CFS is not helpful, with advice to gradually increase exercise and no real explanation of PEM and all the usual sleep hygiene, healthy diet etc.
It's not bad. It's not good either. I guess that's fitting considering we are basically stuck in purgatory. Add time, though, and it's just like leaving people to rot, all while people think they're actually help. The end result is the exact same as full-on neglect.