As someone who primary work is on the admin side of running a business, finding ideas on how to set up desks and work flows kinda of under served on social media.
What I've found that works for me has been mainly by talking with other people around me with the same work profile than me, or by experience. While creator setups can be of some help, admin work has some things that not the same on the details.
For example, a two monitor setup is quite helpful in admin work. Most of the time we are comparing information from two different apps, so having a second monitor handy, even an ultra wide one could be an option, we don't need a 4k with a high refresh rate monitor.
The same goes for laptops, and desktops. We don't need the greatest, or latest, hardware to do our work efficiently. 8GB or 16GB of RAM, with a 256GB or 512GB SSD are more than enough for admin work at most small and medium size businesses. Most of the time, if there is a limit is how the files that need to be shared can be shared cheaply and with ease.
Desks and chairs aren't much of a problem, since they are easier for each admin worker to know what is what they need, and what they need to organize on it.
If anything, speakers, webcams, microphones, and headphones tend recommended tend to be an overkill. Most consumer grade offering on these peripherals are more than good enough for most people. To be honest, most of what admin workers are sold on these peripherals are nice to have, but no actually needed. The same goes for mice and keyboards, most won't really notice a difference on the high end of those peripherals from a mid range one.
Personally, I feel frustrated I don't get ideas on targeted on my needs. Instead having to hunt for those ideas piece by piece, from places targeted to people that don't share my type of work. It almost feel like admin work is looked down to, and doesn't get the respect it deserves.