step one. — open photopea.com, click on file on the top left corner, click open and open your gif.
step two. — after uploading your gif, click on file again and open the psd.
step three. — click on layer, and then click duplicate into.
click on the file name of your gif, and then click ok.
step four. — click on the tab with the name of the gif, click on file, export as, gif, and then save it !
the gif without psd :
gif after adding psd :
𓈒⠀𓂃⠀⠀˖⠀𓇬⠀˖⠀⠀𓂃⠀𓈒
hope this helped you ! adding psds to gifs is actually pretty easy. you can request for anything else you'd like to see, and if you have any questions hmu <3