GApps (specifically Google Play Services) will consume more battery than a de-Googled Lineage OS, but this is normal. Using the Pico or Nano variant reduces background processes significantly.
While Lineage OS 19 is an excellent operating system, some users may find it limiting without GApps. For example: gapps for lineage os 191 link
✅ Comparable to a "Nano" package; includes Play Store, Play Services, and core syncing. GApps (specifically Google Play Services) will consume more