Final 5500 for small unfunded welfare plan that previously filed?

Assume an unfunded welfare plan has gone above and below the 100-participant threshold over time and is currently under the threshold - so that it previously filed a 5500 but has not in a couple years. The Plan will terminate and pay all benefits this year (and had below 100 participants on 1/1/25). Does it need to file a final 5500 even though it's under the 100-participant threshold?