https://comicbook.com/gaming/amp/2019/05/05/dungeons-and-dragons-number-of-character-options/?fbclid=IwAR0Hs-HvI9gW5nDF1WGMkrGyrRjizq_e0WjjA5bbVneHizO-4iEeQecL9M4
https://www.reddit.com/r/dndnext/comments/bksm25/how_many_possible_dd_characters_are_there/
Spoiler
~7.02*10^12 = 7,020,285,872,418 = over 7 trillion
TBH I didn't check their work :P
Unless you have group of min-maxers then there are substantially fewer.. at least in their minds.