SPAM filtering?

I guess nobody has an answer?

Yes I finally got it when you are looking at the headers click on the one you want to spam not the message but the circle then go to the right and click on the three bars one will say spam

This did not work for me. I just downloaded the thunderbird app onto my A51 galaxy phone, went to the setting and tried everything but I can not get the spam or junk folder to show anywhere.

Yes I finally got it when you are looking at the headers click on the one you want to spam not the message but the circle then go to the right and click on the three bars one will say spam

None say spam on mine.