For the MacOS Monthly auto-renewing subscription, you will need to open the app on MacOS in order for the subscription to renew. Please try opening the app on MacOS, and click Restore Purchases if for any reason it doesn't automatically renew?
The subscription should then be active on your other device as well, if you've logged in with the same username.
I have purchased a subscription of one month and I have done all the procedures listed above but still it does not
Please forward he purchase receipt for your subscription to firstname.lastname@example.org so that I can manually upgrade the account.