An important lesson for employees to learn is the difference between their own productivity and the productivity of the team. Let's say that if you use the standard issue chair, mouse, mousepad, and keyboard that you would have a productivity of 90/100, but with your custom preferences you would roar up to 98/100. But what if there are 10 people on your team who would each drop from 90 to 88 because they are irritated at you? That's a drop of 20 units and it wildly outweighs your gain. Ignoring the cost of the equipment you want, clearly management is ahead telling you to use the standard stuff. Or even if your team-mates don't care at all (which is unlikely) will your productivity increase earn the company the cost of this equipment? For a mouse, probably yes. Other things, probably no.
The same principle (your productivity is not as important as team productivity) applies to observations that you're more productive if you work noon-8pm, or 4am-noon, or exclusively from home, or in a different programming language. You often have to accept a setup that is a little distance from your own optimum productivity in order to be available to team-mates, or for meetings, or so that you and your team-mates can substitute for each other on projects. And you often have to agree to use equipment that's good but not great, so that you don't appear demanding, or so that other people can use your equipment in a pinch, or just because the company doesn't have the money for what you consider great.
It doesn't hurt to ask, if they are buying you things, if they can be the models you like. If the things they give you are actively terrible and unusable, you could try asking for different ones. But as a rule, learn how to work with what is provided to you, be as productive as you can be with that, and don't make a big fuss. I have bought people special mice and keyboards, but if you tried to get me to buy a $5000 chair, that's a much bigger request and not one that is likely to succeed. (One employee wanted a special trackball thing; when she left she asked if anyone else was likely to use it and everyone said "no" so (with our permission) she took it with her to the next job.)