If you look at the files you have uploaded to BYC, all of your images that I saw have a .jpg or .jpeg extension.
https://www.backyardchickens.com/members/sdm111.214697/#thattachplus-images
You've never uploaded a .heic file.
That's the beauty of Project 365! You can post any picture you want. The gal that I got the idea from is doing all birds this year:
Project 365 (2026) - Birds of a Feather
Last year she did:
Project 365 (2025) - The Sky's the Limit
And the year before:
Project 366 (2024) - The Signs Are Everywhere