Unicode is not millions but 137.929 (latest Unicode 12.1)
Quote:
|
Unicode allows for 17 planes, each of 65,536 possible characters (or 'code points'). This gives a total of 1,114,112 possible characters. At present, only about 10% of this space has been allocated.
|
stackoverflow.com/questions/5924105/how-many-characters-can-be-mapped-with-unicode
Also browsers don't support all Unicode
It totally depends on the used font.