Check Point HTTPS Outbound Inspection can be integrated with HSM for the Outbound CA.
But currently the guide only states Thales/Gemalto/SafeNet Luna 6.
https://sc1.checkpoint.com/documents/R81.10/WebAdminGuides/EN/CP_R81.10_Quantum_SecurityGateway_Guid...
For Luna 7 I just recently asked (for one of my customers) and local office told me that R&D would be interested in doing QA if we give them more information, like for every RFE is needed. So like used version, details to topology use-case etc.