The lesbian kiss in Lightyear

In the lightyear the movie states that it's a 90s movie in universe that spark the events of toystory 1
My question is that would the lesbian kiss be allowed in a 90s kids space movie?
If it would be featured would the movie get a higher rating like a 12 or a 15?

The kiss was a blink and you'll miss it scene but the couple is a plot point.