BMovieBen, as you havent described distance, placement, wall materials in your post, I am getting the feeling you dont appreciate these make a difference to how well or not the sensors will work.
I had placed a link to the sensors chip specs here. If you are assuming they used wifi & operated the same way you assumed wrongly, these are very low power devices running on a tiny battery.
I have 2 dozen installed, and the sensors work flawless. The ones at the very perimeter sometimes appear offline, till the door/gate they monitor is opened. If you dont like seeing the cloud icon, schedule a reboot a few times a day to wakem up.
After using Wyze sense for a year, & following complaints on the forum, I think Wyze needed to spend more effort explaining to ppl that these sensors do NOT use wifi, they use a proprietry flavour of Zigbee (range similar to Bluetooth), to set customers expectations straight.