FP4 Root Access is possible, maybe a bit risky

I just installed the .175 update. After point 3. the phone seemed to be stuck in a boot loop (repeating display of the warning re. unlocked boot loader). After a few minutes the phone started to normal operation. But “About–>Build number” says: FP4.FP4G.A.170.20220920
Therefore I assume the update has not been applied. What shall I do?