How can I install kernel source for SR images?

NXP LX2160
1

Title speaks for itself …

Unsurprisingly, there is no corresponding source package in the Ubuntu repos for:
uname -r
5.10.35-00021-gff2ad17a65ce

Is there some other way to install the sources?

2

I believe it’s this: GitHub - SolidRun/linux-stable at lf-5.10.35-2.0.0-sr