You can use this Automator Application workflow where you drag and drop a folder containing chflags hidden files onto it, and they will be set to nohidden. You may need to visit System Preferences / Settings > Security & Privacy and set this application to full disk access. If not, it may pop a dialog asking for access to your Desktop, etc.
Tested on Ventura 13.2.1
Code:
#!/bin/zsh
: <<"COMMENT"
Drag and drop a folder that may contain chflags hidden files in it
onto this Automator application and have those hidden files made nohidden.
This is a recursive (**) case-insensitive script
COMMENT
STARTDIR="${@:a:s/\~\//}"
setopt nocaseglob
# return regular (.N) files sorted ascending by name (on)
for f in "${STARTDIR}"/**/*(.Non);
do
[[ $(stat -f '%Sf' "${f}") == "hidden" ]] || continue
/usr/bin/chflags nohidden "${f}"
done
exit