The size, shape, weight, structure of AHCA would depend on type & number of weapons it would carry.
LEARNING LESSONS FROM 5GEN JETS F-22, F-35, Su-57
New gen jets would require new gen weapons with modified shape & folding fins, perhaps a different attck profile, like F-22 & F-35 will get MAKO, AGM-88E AARGM-ER, Kh-58UShKE, etc.
For example it is not possible or feasible for Su-57 to carry
like big missile even if its tandem IWBs are joined.
We see that IWBs of both F-22 & Su-57 have some disadvantage.
Su-57 carries only 4 AAMs currently, may be 6 in future.
F-22 cannot carry weapon bigger than JDAM currently. MLU might add something.
Su-57 can carry cruise missle, Kh-58UShKE internally.
A bigger collage shows some current weapons fit, some don't.
A new jet can combine both capability by having multiple IWBs. the centerline IWB will carry customized CrM, AShM, ARM, etc.
And 2 parallel IWBs can carry 2 AAMs each, total 4.
If we imagine a modified diagram of Su-57 & F-22 then it would look like following:
NOTE - This is just preliminary & notional, otherwise the engines & internal components will obviously have to be adjusted.
The following is 1 of the many examples already created by CAD artist Rodrigo Avella in his vision of F/A-XX :
The IWB bottom edge would be wider than F-22.