Ok like the title says I have some old wallet that belonged to my late friend.
First of all, I am deeply sorry for the passing of your friend.
He died in 2021 from Corona and his parents asked me to check his computers and mails and such.
Was it only his parents who asked you to check his belongings? Did your friend ever ask you to do it? Or did he have any chance to tell you about bitcoin? This might be personal questions but I think before you decide how to open the wallet you should also consider what might have been the decision of your friend. If he didn’t tell anyone I doubt he wanted to leave those coins to someone, if there were any.