There is only two genders

Yup... last I heard, hospitals only offer 2 kinds of gender reassignment surgeries...

"There is only two genders"

Nope

What is gender then?

Gender isnt just about putting a p**is in a va**na, claiming manhood impregnating a woman and habitating in an idealized social construct from a 50's point of view. Thats what insecurities are for. Be you, love who you want to love, treat people with the same respect as you require for yourself and never mind the noise of those who cant or wont allow themselves to grow, evolve and understand the human condition is more than just 1's and 0's. Its not the inclusion or acceptance thats pissing you off, it's that you werent raised to understand its not just about you. You really aren't that special

No the problem is half of people say "gender" is the same as sex and use it to do things people find disagreeable. So for an example, they say are nonbinary but have the parts of a boy and uses a girl's locker but the women there are uncomfortable with that.

The social roles related to someones sex, or how they identify

So by this definition here monkeys also have genders

"There are only two genders" Said someone who isn't a scientist and can't do 3 minutes of research

Seriously 3 minutes of research and you learn that gender is how someone identifies and not two boxes

Can cats have more than two genders?

"Since cats have two sexes humans only have two genders" So instead of doing the 3 minutes of research I asked you to you typed whatever the f**k this is? How would cats having two sexes even be related to how humans gender identity. And how do we how the cats view gender, tell me? If you seriously typed this and said to yourself "oh yeah I really owned those stupid libs" you really need to get your brain checked

No it is to establish the definition of words. According to you only humans have genders.

So which part of my definition implied that only humans have genders?

You didn't actually state a definition, I have to use what little reading skills I have understand a general meaning the word "gender" you use. Also you should know asking me to "Research" doesn't work the way you think it does. I rather discuss and debate.

Do cats really have 9 lives?

The nine lives was a cat food

Uhhhm, an old wives tale, an idiom, a saying, etc, the cat food was named after said phrase.

Well the quick answer to that question is

✨No✨

Even crows know there are only two genders.