I would expect the period ending 31/01/2021 to be showing now, as the deadline for submission is usually 1 month + 7 days (7th March in this case).
But as you’re using MTD, we need to use the periods that HMRC supplies. So if the period you’re expecting isn’t showing, you would need to raise it with HMRC directly to see why this may be happening.
It’s also worth checking your HMRC account directly on their website too. If you go to the “Making Tax Digital” section of your account, you should see the periods there too.
It’s worth taking a look at this post - Making Tax Digital: Troubleshooting
Although the post mentions the next period, the situation would be similar.