Eg the one at Development underway for a new generation, multi-omic biological age clock
There are also ones by the Michael Snyder lab (only open to people in SF Bay area) [I have friends who volunteered]
There’s the old “Guinea Pig Zero” (sources of info for human guinea pigs).
Sadly the biggest problem is that most studies anonymize patient data SO hard that people can’t even get their own results back (this holds back progress) [even the data in the MIT BCS cognitive tests], and this demotivates me from partaking in most clinical trials. The money they pay is generally not that worth it.