Some people feel better on progesterone, many don't.
It's only really "necessary" to protect the endometrium.
Available evidence shows that out of clinically measurable outcomes, women taking estrogen alone fare best in terms of breast, cardiovascular and metabolic health. The next best outcomes are with intermittent progestogen and the least favourable with continuous combined.
The negative effects of combined therapy are mitigated but not nullified by using micronised progesterone vs synthetic progestins.
If someone finds progesterone benefits certain symptoms such as sleep or mood, then it is reasonable for them to take it for quality of life even if endometrial protection is not required.
However if I were in the enviable position of it being a choice rather than a necessity, based on the available evidence I would only try it if I had specific symptoms I was hoping it would help, not because a bunch of people on social media are taking it.