Why not go with AMCA’s initial design?
like this?
View attachment 85705
Not a bad idea from the design perspective.
Any of the older AMCA models from 3B-01 to 3B-09 can be used. AMCA team in ADA has generated a huge amount of design data regarding AMCA from 2008-09 onwards and tested several models in wind tunnel.
But so has been also done on LCA Navy programme by the team who is currently heading TEDBF programme.
I think the second prototype being talked about in DDR interview by TEDBF programme director in Aero India 2021 was most likely based on AMCA based model since it talked about a trapezoidal + tail design.
However, Navy has done some preliminary assessment about converting Airforce variant of AMCA into NAMCA in 2016-17 and concluded that is will compromise on the aerodynamic performance of a Naval aircraft.
Hence Navy going with a older AMCA based model design for TEDBF is rather slim.