You are not alone.
The IRS is seriously backlogged because of all the extra stimulus filings, as well as several million unprocessed 2019 returns left over from the COVID shutdown. In addition, the Where's My Refund site has been erratic and unreliable. But if TT told you the IRS has Accepted your filing for processing, then the government has it. (Approved is a later step, but TT receives no further updates once Accepted. ) Lots of other folks are still waiting, so please continue to be patient.
The IRS is behind in processing nearly 7 million tax returns, an early warning sign the agency is under strain - The Washington Post
In addition, the IRS has just started sending out Stimulus payment #3, and it will take a few weeks to get them all out. It comes separately, not as part of your 2020 tax refund. See:
Get My Payment | Internal Revenue Service (irs.gov)