I'm not sure if I've posted this, but my old Patreon ongoing stories (as well as a new one) are available on Kindle Vella. I believe you are able to read the first three episodes of each one for free. Here's the links:
Sarah's Lab (lots of shrinking men, women)
https://www.amazon.com/kindle-vella/story/B0BQ8N4RQJ
Apocalypse GROW (lots of size changing, giantess, shrinking women/men)
https://www.amazon.com/kindle-vella/story/B0BQ8HSZFW
Giantesses of War (giantess, emphasis on destruction rather than eroticism)
https://www.amazon.com/kindle-vella/story/B0BQ8NXY57
New Egypt (fantasy, giantess, shrinking men/women)
https://www.amazon.com/kindle-vella/story/B0BQJXJWNB