So, if you read the post on the krisakura kernel in the p7p forums, he notes the steps needed including disable verity and such.
The power hint module isn't very important as it can be flashed later, however the kernels themselves for this phone have to do a special workaround with each run.
A possible resolution would be to enable the --disable-verity and other flags as an option in your application.
I just came back over from iphone so admittedly I personally am a bit out of date as I haven't had an android since the pixel 3. I wish I could offer your more assistance!
The power hint module isn't very important as it can be flashed later, however the kernels themselves for this phone have to do a special workaround with each run.
A possible resolution would be to enable the --disable-verity and other flags as an option in your application.
I just came back over from iphone so admittedly I personally am a bit out of date as I haven't had an android since the pixel 3. I wish I could offer your more assistance!