It’s a bit of mess, frankly. Some pollsters -NYT/Siena and CNN - are using voter lists that may well be out of date. They give different results to other pollsters who use a different methodology.

IDK about CNN but NYT are overweighting 65+/underweighting 18-25 by about 4% each, and seem to be slightly favoring self identified "conservative" by +2%ish IIRC