The OED doesn't recognise either 'dazzle' or 'charm' in the forms you've mentioned. (It does however refer to a charm of birds, especially finches).
This site agrees with a dazzle of zebras
https://www.mentalfloss.com/article/551081/collective-nouns-groups-animals
Aunty Beeb also recognises a dazzle of zebras and even cites a source. ('The Book of Hawking, Hunting and Blasing of Arms', Juliana Berners, 1486, a.k.a 'The Book of St Albans):
https://www.bbc.co.uk/newsround/48539466
I suspect that some of the other unusual terms that are occasionally heard might also be derived from the same source. However it seems that Ms Berners had a somewhat playful sense of humour, including such collective nouns as 'a disguising of tailors', 'a neverthriving of jugglers' and 'a doctrine of doctors' in her listings! So she quite possibly simply made up some of the terms which quiz shows, etc, still use today:
https://www.bbc.com/travel/article/20181108-why-a-group-of-hippos-is-called-a-bloat
https://archive.org/details/cu31924031031184