You need to call Marriott customer service for your Marriott status; but can check your SPG status on the SPG Dashboard at SPG Dashboard.
spg dashboard just shows year elite, but it doesn't distinguish between gold and plat. the member would need to call for that info.
You need to call Marriott Rewards to get that info at 800-321-7396
You can now see your lifetime status in the Marriott app by going to the My Account page and swiping to the right.
Retrieving data ...