That's what I did. I did the same of several other OpenWRT devices, and it works fine. Except for that D-link DAP-2610 access point using an ipq40xx chipset.
I think there's something wrong with that chipset when using VLANs :
https://forum.openwrt.org/t/d-link-dap-2610-first-steps-with-vlans/123024
https://forum.openwrt.org/t/dlink-dap-2610-cant-get-vlans-running/68382
https://forum.openwrt.org/t/vlan-of-wan-on-ipq40xx-avm-4040-solved/84354
https://forum.openwrt.org/t/d-link-dap-2160-vlans-and-wifi-newbie/84051/6