I agree with Chris. This isn't due to a COVID jab.
As a prostatectomy patient, your max PSA would be a rising 0.1 or stable 0.2. Max temporary rise due to COVID that I've seen reported is 4x, and you are way outside that. Plus the COVID rise is temporary, but you have a doubling time of a year (depending on the exact timing), and you should be back under the care of oncology now.