Yes, the Feit Electric Smart Wi-Fi bulbs will work with Mesh Routers. The bulbs require a dedicated 2.4GHz band during setup which might require additional steps. For the best and easiest way to set up a 2.4GHz band, please contact your router manufacturer for support.
Note: We do not have any intentions at Feit Electric to make our smart product line 5GHz compatible. Although the 5GHz frequency is the strongest and fastest, it does not have the longer range that our customers need to link smart devices across their homes.
Here's an article with more Wi-Fi tips