Device info https://wiki.lineageos.org/devices/xt897
Rom https://www.androidfilehost.com/?w=files&flid=300223
Please Note: This is an Untested build. Please try at your own risk.
I made an update for this device, enjoy 
:
e-0.9-n-20200711-UNOFFICIAL-xt897.zip
TWRP : https://dl.twrp.me/asanti/ (the rom is compatible with xt897 and asanti_c)
Don’t forget to backup and share your experience, thanks 