Yes you could file, however if possible I would wait to file my 2020 return after I have received notice the 2019 return has been accepted. This may help with duplicate processing issues.
I would not hold your current return past the required filing date for your 2020 return. You want to make sure the 2020 return is filed on time.
Last year, the deadline for filing your federal income tax return was pushed back from April 15 to July 15 because of the COVID-19 pandemic. However, even though the start of tax season is later than usual this year (February 12), the April 15, 2021, due date hasn't been changed – at least so far.
