This bash script converts simple pass files to bitwarden. Check the comments to understand what "simple" means ;)

pass_to_bitwarden.sh

#!/usr/bin/env bash
function pass_to_bitwarden(){
	local path_to_pass="$1"
	local output_path="$2"
	#echo "searching path $path_to_pass for simple logins"
	local url
	local username
	local decrypted_stuff
	local password
	local notes
	#echo "Initialized the csv file header for bitwarden (individual account)."
	echo "folder,favorite,type,name,notes,fields,login_uri,login_username,login_password,login_totp" > "$output_path"
	for folder in "${path_to_pass%/}"/*; do
		if [ -d "$folder" ]; then
			#echo "found potential match for url: $folder"
			url="$(basename "$folder")"
			# best URL regex, I know...
			# comment this if-statement out, if you don´t name your folders after domains. the 'login_url' will still be set though...
			if [[ "$url" ==  *"."* ]]; then
				for file in "${folder%/}"/*; do
					#echo "found potential match for username: $file"
					username="$(basename --suffix ".gpg" "$file")"
					if [ -f "$file" ] ; then
						decrypted_stuff="$(pass "$url"/"$username" 2> /dev/null)"
						password="$(echo  "$decrypted_stuff" | head -n +1)"
						notes="$(echo "$decrypted_stuff" | tail -n +2)"
						#echo "the AI has deterimed, that;"
						#echo "URL: $url"
						#echo "Username: $username"
						#echo "Notes: $notes"
						#echo "Password is BEEEEEEP!"
						#echo
						echo "passwordstore,0,login,$url,\"$notes\",,$url,$username,\"$password\"," >> "$output_path"
						mkdir -p "${path_to_pass%/}"/Archive
						pass mv "$url"/"$username" Archive/"$url"/"$username"
					fi
				done
			fi
		fi
	done
}
if [ -z "${1// }" ] || [ -z "${2// }" ]; then
	echo "Converts simple pass files to bitwarden(csv)."
	echo "Usage: pass_to_bitwarden <path to password store> <path to csv output>"
	exit -1
fi
# This script will scan the given path for password store logins in a simple format, and in this format only!
# Simple logins are assumed to be '<directory>/<file>' with the file content being lines of text.
# The directory name will be used as the 'login_uri', the file name as the 'login_username' and the first line of text as 'login_password'.
# Additional lines of text will be stored as 'notes'.
# Logins that do not fit this scheme will be ignored. Those that fit will be printed in CSV format that bitwarden understands.
# Additionally, those logins that fit will be moved to an 'Archive' folder within pass, in order to ease migrating the rest of the logins manually.
pass_to_bitwarden "$1" "$2"