@ssyed
Unfortunately, TP-Link does not support DFS channels in either Canada or USA, at least for EAP225v3, EAP245v3 or EAP225-Outdoorv1.
For Canada using these 3 EAPs:
Indoor our choices are 36, 40, 44, 48, 149, 153, 157, 161.
Outdoor our choices are 149, 153, 157, 161. The EAP225-Outdoor is limited to just these four. USA gets more, but once you have Canada firmware on an EAP225-Outdoor, you cannot deploy non-Canadian firmware (even if you move countries or did it accidentally when you are not even in Canada)
I cannot comment on any other EAPs as I only have the 3 I listed.
edit: channel 165 is available if you select 20MHz channel width