Keyboard wise? At this point, prices have dropped enough that there is no real reason to go to one of the major manufacturers for anything that isn’t disposable. And basically “all” of the smaller batch mechanical keyboards are dependent on QMK or VIA to some degree which means you can customize them on any machine that can run chrome.

For the logitech price point/build quality? Unless you know why you don’t want one, you can’t go wrong with a Keychron (https://www.keychron.com/). The price and build quality isn’t “the best” but it is very much on par with the logitechs and razers of the world and they are perfect for someone who just wants “a keyboard that works” or someone who wants to learn what they ACTUALLY want out of a keyboard.

Mouse wise? There are an increasing number of “third parties” but… they basically all suck unless you are going to go crazy and mod them. And while I think the firmware matters less in these cases, there are an increasing number of qmk/via mice but… they mostly feel “cheap” or like they are just proving the viability. I have a friend with a ploopy but even he doesn’t really recommend it. So… you are still more or less suck with logitech and razer and the like for that. But hopefully as those companies lock their hardware down more it will lead to something in between “here is a cheap no name ergonomic mouse” and “here is a five hundred dollar mouse”.