I do not have loops with 4 interconnected switches, I would like to know why, that is, I do not have a blocked port

hello I would like to have your understanding on this problem solving I don’t speak much English but I’ll try to explain

I have two subnets here and two vlan that happens I know very well the STP ptotocolo but I observe that there are no loops and I have redudancia in the network and I see this and I say and because not there is a blocked port

data I have the interfaces in trunk and native mode because the one that is not colored is a vlan 99 for native traffic then what would be the cause of this problem that there are no loops