hi @WillSG is wrong. it dosen't work now.
but i found the way finally lmao
use "List" in power automate desktop. like this
(image used korean but i prepared english explation below!!!!!!)
before: set filepath as "value"(or variables) like file1path and file2path
(example : file1path is "C:\Users\lsd612\Desktop\a\sample.jpg", file2path is "C:\Users\lsd612\Desktop\b\sample2.pdf")
first : make new List(file_list)
second: add value(file1path) to the list(file_list)
third: add value(file2path) to the list(file_list)
fouth(finally) : used list(file_list) as attached file path in "Send email"
like this
p.s. : i don't have english language pack now. images are will be chaged later.