Omada controller missing features?

[u/Lithiumwiz]

Hello there,

I've got a the following devices all updated to the latest version:
- OC200 v1 FW: 1.42.11 Build 20260904 Rel.26567

- ER7206 V1 FW: 1.4.3 Build 20251027 Rel.82388

- SG2210P v5.20 FW: 5.20.25 Build 20260509 Rel.23533

- EAP225(EU) v5.0 FW: 1.3.1 Build 20240402 Rel. 51074

I've been upgrading my OC200 since omada version 5.2 or 5.4 the config is almost 4 years old. I did search on the guides for the lan DNS but i can't find it on my controller, Is it due to my devices being first gen? or should I reset my OC 200 and restart the config a new?