For what it's worth:

My gas dryer (Maytag Neptune) did essentially the same thing that
yours did, at about the same time (early march). The gas would light
up, but for only a few (5) seconds, and therefore the dryer never got
hot.

I looked at this thread and figured out that I should replace the
coils. I did. That did not work.

I found out that the Maytag (and possibly many other gas dryers) have
a flame sensor, that mounts near the ignitor, on the shield, and it
can go bad. I changed that as well.

Seems to work OK now.

Thanks for your collective help.

Pierre