Renting of commercial property in composition.

1.Composit Scheme In term of Section 10(2A) availing scheme prescribed in vide Notification 2/2019 CT(R) , yes you can supply Intrastate supply goods or Services or both. But with few restriction ie 1.Agrregate Turnover in preceding FY did not Exceed 50 Lacs .
(Note : Require to pay 6% GST without ITC on turnover)
So under this scheme you can you can supply both the services & Goods but subject to conditions specified therein.

2. Of you are registered as composit dealer covering under Section 10 , you can supply services but only upto the value of 10% of Turnover in preceding FY or 5 lac rupees , whichever is Higher & the turnover limit under this scheme is 1.5 crore.
So if your turnover in preceding FY is of 90 Lacs , you can provide rental services upto 9 lac rupees .

So if you fulfills the above conditions can continue under composit scheme, but as it's my personal advise if you have a enough rental income you should Opt for Regular Scheme.