Opinion here from a support provider.
Don’t think it is quite as straight forward as Andy suggests.
Two sorts of supporting people contracts;
1) Block Gross contracts for short term services eg a hostel. Grant is a fixed amount payable to provider irrespective of occupancy levels and no liabilty for the tenant to pay so shouldn’t be part of the tenancy agreement.
2) Subsidy contracts in permanent accommodation eg sheltered housing. SP grant is means tested therefore tenant could be liable, and paid according to occupancy. Some providers have kept support in the tenancy agreement, others have moved support costs in to a separate support agreement.
I’ve got the guidance issued to providers prior to SP on this. PM me if you’d like a copy.