There's a tech transfer of various satellite buses from ISRO to various private players. IMS-1 has already been transferred, however it's the IMS-2 that perfectly matches the power and cooling requirements. The Oneweb satellite ISRO launched were similar in size to IMS-1 based satellites.
The only problem with the above is the form factor, it's cubic and cannot be stacked in large numbers like Starlink which are purpose built.
I'm guessing they can source the communication payloads from players like ADTL or AMPL. Lots of ifs and buts there. The only glaring bottleneck I see is the launch capacity.
