This is a OneUp EDC steerer tube plug with room for a Tile Sticker tracker.

This one fits great inside a 2022 Pike. Fusion 360 file is attached to modify it.

I have printed this in TPU 95. You may be able to modify it to work with other filaments, but it would require several adjustments.

If you extended the bottom, you could make room for an AirTag but it might be more noticeable.

If you don't have a OneUp tool, just cut the top off in your slicer.