I'm not sure if anyone has had this issue before but I have a trunk port coming from my router that carries a mgmt vlan (100) and a user vlan (200)

I have assigned both as tagged on port 1 of the TP-Link switch (with pvid of 100) (management vlan is just there for the switch to get it's ip

I have also assigned ports 2-4 as access ports for vlan 200 which connect the clients (these ports are untagged on vlan 200 with pvid set to 200)

All of the ports above are excluded from vlan1

Everything gets the proper ips assigned correctly and the correct gateways are reachable as well as the internet, however, the 3 clients on ports 2-4 (which also belong to the same vlan) cannot see each other. This is the simplest setup ever and I am baffled why this is happening. I have eliminated the firewall being an issue since if I switch to my Cisco switch, they see each other just fine. So that leaves this switch. I have played with the vlan config and have not managed to find a solution so any guidance is much appreciated. And before you ask, I have run out of ports on my cisco hence this addition.

Also don't worry about port 8 in those photos I was just testing stuff, nothing is connected to it at the moment