are you sure? how did you check this?
to read that file using the file component you will have to remove the /storage/emulated/0 to get a relative path for the file component…
this filename should work for the file component:
/My Documents/Downloads/app_inventor_1605564580403.html
EDIT: but as it is a html document probably better to use a webviewer to display it… in this case use the full path…
Taifun