The main instructions for finding checked out files can be found here, but you may also need to create a flat ‘folderless’ view first. Note that if there are a large number of files within the structure you are searching the online view does not show all the files immediately; it is better to drill down as low in the the folder structure as you can go and work back up, looking for checked out files (with the newly created view) as you go.
MS Teams – “We can’t set up the conversation because your organizations are not set up to talk to each other”
If you try and make contact with someone outside your organisation within Teams you may find that when you search for...