So you want to use it as extender/repeater?
There will be a speed penalty, of course, usually for this role devices with two radios are used.
Each radio can be either AP or Station, not both.
But you can add a “virtual” radio as slave to the Station radio and set it as AP, the issue with a device like the sxt sq5 might be that it is a rather directional one, so the AP won’t cover a large area.