Nope, your devices will not be impacted at all.
Your Wyze products will not be affected if 3G is no longer available through your cellular provider. Wyze devices do not currently use cellular data to function. Most Wyze devices are only compatible with 2.4 GHz Wi-Fi connections while some also offer compatibility with both 2.4 GHz and 5 GHz Wi-Fi connections.
Changes made by cellular service providers, like removing 3G support will not impact the connection your Wyze device has to your internet.
You can learn more about our Wi-Fi requirements and compatibilities here: https://support.wyze.com/hc/en-us/articles/360054370991-What-kind-of-WiFi-network-or-router-do-I-need-