Here are suggestions that might be helpful for you to substitute Online Meetings:
OT and AOT may compile the Host Links for their OGLs in cases where the OGLs cannot provide them.
You need to compile them manually, as the BSF Online website (My calendar page) only provides you the Join Links, not the Host Links.
OGL may compile their fellow OGLs' Host Links in cases where the OGLs cannot provide them.
You need to compile them manually.
Please read these Support articles for more information: Substitute Leader, Leader - Host Link vs Participant Link, and Leader - Online Meeting Link