It seems the Air Force wants to be rid of the F-22:

“By about the 2030 timeframe, you’re talking about a 40-year-old platform [in the F-22], and it’s just not going to be the right tool for the job, especially when we’re talking about defending our friends like Taiwan and Japan and the Philippines against a Chinese threat that grows and grows,” Hinote told Defense News in an exclusive May 13 interview.

This Quora post has also some interesting context:

the F-22 fleet was not produced in sufficient quantities to replace the F-15, and therefore its logistics and supply chain do not benefit from economy of scale as much as jets like the F-16 and F-35.

…

the F-22 was designed primarily for fighting in Europe and turn of the millennium era threats, and so its combat radius of approximately 590 nautical miles (less with any use of supercruise) is not ideal for a war with China

…

the F-22 is considerably hampered by old ADA code with limited modularity, being run on old processors. Because the software isn’t very modular or open, adding a new sensor requires a lot of extra work. For the F-22 to outperform jets like the J-20 into the 2030s and beyond, it needs to keep up by getting a helmet mounted display, a panoramic cockpit display, updated electronic warfare systems, long range infrared sensors, updated communications systems, improved sensor fusion and combat ID systems, etc.

So in other words, it is a jet built for a different time/enemy, wasn’t built in sufficient numbers to be economical to keep running, and wasn’t built in a way to be modular with avionics upgrades. Yet another classic defence procurement folly.