Does apple have ergonomic accessories?

don't think apple ever dabbled in ergonomic one could advocate their old puck mouse as in the opposite direction really

you can suggest they enter the field by using their feedback channel

Product Feedback - Apple

I use this one Logitech ERGO K860 Wireless Split Keyboard

at home and at work, pretty happy with it

Have you tried looking at the online Apple Store to find out what they offer there? What would be considered "ergonomic" to you may be different than what others may feel would meet this criteria.

Apple does offer a number of keyboards and mice to choose from. Otherwise, another excellent source for these is Logitech.

The ones they produce are there

Mice & Keyboards - Mac Accessories - Apple

but many other accessories makers have ergonomically stuff which works great with Mac computers

The Logitech link I provided you, will take you to their online store where you can purchase their products directly.

As far as Amazon, if you prefer, I just did a quick search and they had multiple Logitech devices listed.