When I installed it, the EOL of 4.19 was december this year, this was changed in the beginning of june.
The most recent LTS is 5.4, the community yocto releases for i.MX6 boards use 5.4. (codename zeus) which i have more faith in than the Seeed releases based on beaglebone code. Given that the Kernel is built with the i.MX in mind and not the Ti processors.
Given that sysfs access to gpio is deprecated and mem is discouraged, i’d prefer to use 5.5 because in that release libgpiod is ‘completed’. But i’m still learning the ropes of Yocto.