I think wheeled ones should go to the WhAFV(R&S) tender.
Let's break it down.
WhAP is not Tata's design, it's DRDO's. It was developed for non-army requirements and its derivative is meant for the army. The derivative, a second WhAP was designed with Mahindra.
First gen WhAP is for police forces, the second gen falls significantly short of army requirements compared to FICV/WhICV. So it will be superceded by Vikram for the main tender. DRDO calls Vikram their third generation design after the first 2 WhAPs.
When it comes to WhAFV(R&S), the competitors are Tata and Mahindra WhAPs alongside AVNL's new design for WhICV, perhaps more at a later date. This is meant to replace BRDM for RS roles. So the IA is not looking for commonality with FICV/WhICV here, even if desired.
Stryker was competing for the WhICV tender before it was kicked out for non-performance. IA claims WhAP is not sufficient too.
I don't see WhAP capable of beating Vikram either, since the prime designer claims Vikram is a whole lot better.
If WhAP doesn't work out, it's likely we will start seeing commonality between WhAFV(R&S) and WhICV tenders. But two different designs could win. Maybe DRDO wins RS using Vikram and a private company could win WhICV and a third company can win FICV, which implies there could be no commonality. The only way out is IA deliberately forces commonality between WhAFV(R&S) and WhICV. Best case, a company comes out with a superlative design and wins all three.
For those who do not know what's happening, IA needs 50 battalions. 30 tracked, 10 wheeled, and 10 R&S. Earlier it was 40 tracked and 10 R&S. 30 tracked are FICV, 10 wheeled are WhICV, and 10 R&S is a mix of wheeled and tracked. Overall, a battalion has 53-59 vehicles. Essentially, 39 combat units and the remaining are reserves, 6 minimum attached to the squadrons, up to 14 more attached to the regiment.
The R&S uses a mix of BRDM-2, BMP-2, and NAMIS. BMP-2 will be replaced by FICV over a long period of time and NAMIS stays as is until phase out after 40 years.