I’ve had similar issues with my laptop’s trackpad not working when I reboot. The issue hasn’t appeared on my laptop (7940hs +dGPU) since I manually updated my kernel to 6.13-rc6 and 6.13-rc7.
I followed this guide (How to Compile and Install the Linux Kernel on Ubuntu - David Augustat) using the newer kernels and it worked flawlessly for install.
Can you test if it does the same for you?