The GeekBench [1,2] benchmarks for M2 are:

Single Core: iPad Pro (M2): 2539 Macbook Air (M2): 2596 Macbook Pro (M2): 2645

Multi Core: iPad Pro (M2 8-core): 9631 Macbook Air (M2 8-core): 9654 Macbook Pro (M2 8-core): 9642

So, it appears to be almost the same performance (until it throttles due to heat, of course).

1. https://browser.geekbench.com/ios-benchmarks 2. https://browser.geekbench.com/mac-benchmarks