Sadly, the way regex work in Bubble doesn’t use the full regex syntax (and this is sad).
Here’s what you can do:
text:extract with regex (regex expression will be: #abc\d+): join with “,”:extract with regex (expression will be \d+)
First step is to output a list of #abcXX and ignore other number. we need to join with because this return a list. A last regex will extract the number from the previous regex.