Hi,
Thank you for your interest in NXP Semiconductor products,
5.15.x and 5.10.x kernel versions are supported until next year, the rest of the list isn't supported, the hardware isn't recommended for new designs, also, SW teams that coded it aren't complete to this day.
In new designs, I would recommend starting using i.MX 9 series with kernel greater than 6.
Kernel versions are found here.
LTS is found here.
Regards