There are other companies doing exactly this (for a random example: https://www.bartechnologies.uk/ https://www.bartechnologies.uk/), but they definitely don't

There are other companies doing exactly this (for a random example: https://www.bartechnologies.uk/ https://www.bartechnologies.uk/), but they definitely don't replace the need for engines entirely, just reduce their usage by a bit. Not sure why you would expect a fusion company to have anything to do with this. The technology is completely different. (Note: not affiliated with launching company, just a random commenter)