Kanto
Physical: 43
Special: 32
Johto
Physical: 32
Special: 31
Hoenn
Physical: 50
Special: 41
Sinnoh
Physical: 44
Special: 37
Unova
Physical: 55
Special: 41
Kalos
Physical: 20
Special: 24
Alola
Physical: 35
Special: 25
Galar
Physical: 38
Special: 22
Note that I did not include Pokemon that were once fully evolved but now are not (Scyther, Roselia, etc.). I also did not include form changes (the Calyrex forms, for example), nor regional forms. Let me know if you want any of these included.
Source: Every single fully evolved Pokemon's stat section on the DB
Hope I helped!