I confirmed the intended direction: use bare BMP388 and ICM-42688-P sensors with a Portenta H7, sharing a 3.3 V I²C bus and adding the required decoupling, pull-ups, address configuration, and interrupt connections.
No project changes were made. The source project remains view-only and still needs to be forked, then the components added, wired, and verified. Execution stopped because your ACUs ran out.