FYI reentry procedure changed at Suw same as Don Mueang. So, first you will be stamped out and then will “revive” your invalidated extension ... weird but it works now like this
TLDR : Answer Summary
The reentry procedure at Suvarnabhumi Airport has changed to match the process at Don Mueang Airport. Travelers will now be stamped out of the country first before purchasing a re-entry permit. This update was confirmed in community discussions, with travelers seeking clarification on whether they can still apply for a re-entry permit prior to departure.