I am a midline maxillary diastema patient. Can I do composite or ceramic veneer without frenectomy? Not a fan of braces (Photo)

I have a big gap on my upper central incisors. I'm wearing removable appliance for both arches in my mouth as I have mild misalignment of teeth. The problem rises only on my maxilla which is the gap. I've been told that the gap cannot be closed due to the frenum in between which I need to undergo frenectomy in order to close the gap. If I want to do veneer treatment, do I still need to do frenectomy ?I've read about porcelain veneer and composite veneer and which one is better for my case?