100% absolutely ok :)

You can blend hydrogen in to existing natural gas infrastructure at up to 10%.

There's an Australian dual fuel plant going in to service in a couple years that can do from 5% to up to 100% hydrogen in the future.

While you can't use existing natural gas infrastructure, the logistics of hydrogen are pretty similar, otherwise blending and dual fuel systems wouldn't be possible.

https://www.austrade.gov.au/news/success-stories/australia-a...