Sounds like a fun fact, but were those drawn by people who can draw cows and humans, and aim to draw realistically? Middle Ages were quite a dip in art generally, AFAICT, with humans often not looking realistic, either.
Check out this Cambodian lion: https://artuk.org/discover/artworks/a-guardian-lion-281362 The craftsmanship is quite impressive. But it doesn't look anything much like a lion IMHO.
[1] https://en.wikipedia.org/wiki/Chinese_guardian_lions#Appeara...
https://en.wikipedia.org/wiki/Tower_of_London
"Records of 1210–1212 show payments to lion keepers" - although who was allowed to visit the lions is a different question ...