Need a simple Data & Resource Pack updated - Java 26.1.2

I have my own Data & Resource pack that works on 1.21.4
Its just a few simple things, no complex codes:
1 Player model (as a statue)
1 upside down flamingo (as a statue)
1 Cheshire cat skin
3 sounds

I think that's it.
It has been a while since I touched my big MC project & finally want to get back to it.
I did figure out how to update them to work on 1.21.4
But have NO IDEA how to update them to work on the latest version.

Java 26.1.2

Can someone help?
Please DM & I will send the Data & Resource packs.

Added note:
This site has been MAGICAL for me!
I have learned how to make my own Data / Resource pack & update it by
downloading from here & reverse engineering.

I am now at a loss as to the next upgrade to make it work.

Thank you!