You need to ask for a status challenge from Marriott Rewards. In the past, they were reluctant to offer it, but I think it is easier to get it now with the reduced business travel.

For Marriott status matches are offered where you must stay a certain amount of nights in a 90 day period:

Gold: 12-13 nights (I am not sure of the exact number)
Platinum: 18 nights

They will give you the status you are seeking to match during the 90 day period. You keep the status for the remainder of the year (it counts as if you met the current year's requirements) if you meet the requirements for the challenge.

See this thread for a successful platinum status challenge.