I'm assuming they meant "extendable". In which case the longest MAX model already did this, but it was avoided by other models due to engineering cost. https:

I'm assuming they meant "extendable". In which case the longest MAX model already did this, but it was avoided by other models due to engineering cost. https://aviation.stackexchange.com/questions/71500/why-wasnt-the-737-maxs-landing-gear-lengthened-enough-to-mount-the-engines-und https://aviation.stackexchange.com/questions/71500/why-wasnt...