How Do I Import Google Takeout Into Immich?
Immich sorts by the date inside each file, so fix the metadata before uploading rather than after.
Immich reads the date and location from inside each file when it indexes your upload. A raw Takeout export gives it almost nothing, so the timeline collapses onto the upload date.
Immich has tooling for Takeout, but it is far simpler to hand it files that are already correct. Then there is nothing to configure and nothing to reprocess later.
Takeout JSON Metadata Fixer writes the dates and places into the photos first. Point Immich at the result and the timeline is right from the first scan. It runs on your own computer and is free for your first 500 photos.