Hola ISABEL,
It depends what template you're using, becuase some of them are not supported for Joomla4/5 anymore. But if you have SPPB 3.8.10 you should be able to make migration to Joomla 4.4 and component will still work. Later you can upgrade everything and go to J5.
If you already have there Helix Ultimate, it will work and you can ignore Joomla warnings releated to Helix Ultimate and SPPB plugins. And yes, we informed about that in documenation.
But as @Ziaul said, indeed we don't offer free migration services, it's always premium service.