Found these two [1][2] a while ago, but there certainly not cheap...Neff - to my understanding - offers a more or less modular stove, and they over induction and gas, but can't find the hybrid unit I saw a while ago.

[1] https://www.teka.com/en-lt/serie/the-hybrid-hobs/ [2] https://www.winnings.com.au/c/kitchen/cooktops/gas-and-induc...