They aren’t required to. Is your concern just that they don’t give you $ for going to a conference? This varies widely. Some will pay to send you to any conference you have a paper accepted to. Mine sent us for podium presentations but auto declined posters. Most programs give you information on CME $ allowance when interviewing.
If your concern is getting CME for your residency specialty certification requirements, just being in fellowship typically counts as enough CMEs to maintain certification.