The latest versions of the Comply Foam TrueGrip Pro Tips 2.0 are made for Google's latest Pixel Buds A. Therefore, these TWS accessories now have third-party add-ons geared at improved fit and comfort, due to their memory foam-based construction. The new Comply tips are also compatible with the original Pixel Buds, and are on sale from now.
https://www.notebookcheck.net/The-latest-Comply-foam-ear-tip-versions-are-compatible-with-the-Pixel-Buds-A.553005.0.html
Comply foam tips are the best tips replacement, esp. for people having comfort problems with standard silicone tips.
The disadvantage is they worn our rather quickly (compared to eternal silicone) so they need to be renewed now and then