I have several Tuya based PIR sensors. I have them connected to home assistant via the Tuya smart app and while they do work, they are very slow. That is to say that it can take anywhere from 1 second to 10 seconds before the state changes. I don’t know where the problem lies - it’s definitely not my signal strength.
Is it possible to connect these PIR sensors directly to HA?
Hardly can any one else with the little information you provide… It might be just the ordinary sh*tty tuya stuff which communicates over wifi but being battery powered at the same time causing heavy lags because it just takes time to establish a encrypted wifi connection (4-way-) as well establishing the TCP/IP connection which might include some DHCP negotiations too… Maybe even send your motion detection ones around the world (over other peoples computers AKA cloud ) before finally reaching your home (again) and “dropping” the detection event in HA
But to know it you should really (try) to ask a good question and delivery at least the basic information