If using two krakensdr

I wondering if for example using two krakensdr, and 10 antennas, and of course software…would it improve?

What metric are you looking to improve?

With the current hardware you can’t combine two KrakenSDRs.

Also note that even if you could increase the channel and array element count, the antenna array has to naturally get larger with more elements. The advantage is better resolution, and hence better multipath discrimination.

For example, at 433 MHz an optimal array radius is about 29cm for 5 elements. At 10 elements the optimal array radius is 56cm. That gives a ~4 degree resolution improvement.

At the same time computing requirements increase, and a Pi 4 would no longer be suitable.