Absolutely. Rumors that have been correct so far (and correctly predicted the M1 Pro and M1 Max 16 and 32 GPU core configurations) say that Apple is planning a 2 and 4 M1 Max multi-die design in the future. The M1 Max already has a die-to-die interconnect bus that is unused. Also, according to reverse engineer Hector Martin, the interrupt controller on the M1 Max theoretically allows for up to 8 M1 Max dies (though whether Apple is planning such an insane layout is unknown and unlikely.)

If the (very likely) 2-die version is released, that'll be 64 Apple GPU cores. If the (likely) 4-die version is released, that'll be 128 Apple GPU cores. Coupled alongside that would be up to 32 Performance cores and 8 efficiency cores. That should be good competition for anything NVIDIA and Intel Xeon.