I would say a 0.6 rise in PSA in a year wasn't exceptional. I had PCa and my PSA tests were 6 in 2021, 9.6 in 2022 and 12.3 in 2023 just before the RARP.
I'm not ruling out PCa, but if it is then you sound as though they have caught it early enough that there is a very high probability of it being cured.