I've put together a guide from knowledge I gathered over the last couple of weeks as I eventually got around trying Lineage OS on my F(x)tec Pro¹:
https://slions.net/threads/lineage-os-for-f-x-tec-pro1.90/
It takes you through the installation process from Windows setup to Magisk root and SafetyNet validation to working around prominent issues.
It will also take you through the build process from Windows environment setup to development and code contribution.
Also taking this opportunity to mention how awesome it is to be able to update, use and customize almost every aspect o