After you file

Your third payment will be processed, they are just now getting caught up and you should see it within a reasonable amount of time.  We got all of ours, the last coming just last week.  Like you my 2019 is still not processed.  I go to my IRS account on a daily basis to see if they have posted it, but so far nothing.  Covid screwed up a lot of things, but nothing compares to how backed up and messed up the IRS got from them scuttling their entire work force.  Hopefully they recover soon and all is back to normal before the 2021 tax year is filed.