Yes the H24 project are going for a Le Mans entry in 2024, worth a look at their website if you are a fellow hydrogen convert.
It was featured on the recent ITV4 program Goodwood FOS Future Lab, always a great exhibition to look around when you attend.

Red Bull should also have an entry for 2024 along with others I suspect.

In 2025 they will be allowed to contest for outright victory, so it will be interesting to watch the progress of these racers and the subsequent translation into road use.

2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev