What is your question? Please describe.

Can i edit these files in the directory of data/spawnanimations/tags/entity_types/particles and add modded mobs so they have custom particles just like we can edit spawn animations?

Yes

Yes

Like that? ;)

I add it via my mod so i won't have to edit the files of ur mod every time i take update.

Well it didn't work.
I don't know what i did wrong ;v

Oh nvm everything alright, it was my bad. I forgot theres a older version of Deeper And Darker in my test profile.

Thank you for your helps again also! You might wanna pin this issue so people can get their answers quick if someone come for the same thing

I don't know, everything looks correct... Could you check your logs for any errors?

Oh? i think i did a mistake

But i did everything right :(