I have no data to confirm, but as a relative of a pilot, they are reporting taking a lot of "green slips" (uncovered flights) and experiencing some pressure to come in while fatigued, which they are resisting successfully as they have enough seniority and $ to not make it worth it.

Wonder whether a corollary of that would be that more inexperienced pilots are succumbing to the pressure and coming in while fatigued.

Juan Brown of the blancoliro channel on youtube had been talking about this near the beginning of the pandemic. The flying industry came in and asked for a large number of long time pilots to early retire at the start of the pandemic, and I believe a large number did. Then somewhat quickly demand bounced back causing a pilot shortage, leading to the industry putting out a call for new pilots.