Instead of using the frame number ($F) for simulation in a Solver node, is it possible to drive it using a custom parameter? I'm having an issue with the Solver node while building an HDA.

Where is this custom parameter coming from?

I think a much easier solution is just to solve frame by frame then use Retime or Timeshift to align your solved result with this custom parameter.

Yes, I found the Timeshift node. Thank you for your help!