My immediate reaction was that you could go to the "Trash" folder and then move the email back to the "Inbox" but then I could not find any possibility to move or copy emails to another location. On Thunderbird desktop I often use copy or move for emails so I will look at opening another Idea with this suggestion.
After a bit of searching around I found the "Move" and "Copy" function.
When an email is open you can open the menu at the top right and open the menu item "Refile" at that point various options will open for the curent email including "move" and "copy"
About the deletion confirmation, I personally prefer confirming instead of cancelling a deletio. But anyways, why not just go and restore it from the bin?