Earlier quoted context omitted.
I don't buy it. Even when I was working in countryside Europe a decade ago we had better equipment than that and often double display (17" or 19" at the time). Some of the companies even had personal offices or small offices for 1-3 people. I don't doubt that there are some shitty companies out there that can't get an office chair and a display from this decade, but it's far from the norm.
Maybe things have gotten better but I worked at a couple of large engineering companies in London 5-10 years ago and cramped, shitty, open plan offices with cheap ancient hardware was very much the norm at every place I worked at and visited. Coming from offices in Norway and Sweden I was shocked at how terrible their working conditions where.
That includes multiple floors full of developers. On our floor the entire department had quadruple monitors (24" IPS Dell UltraSharp monitors if you're interested). Allegedly we're privileged because the norm is only 3 monitors for developers, the story goes that when the department was opened almost 20 years ago the head decided that developers would get proper equipment or the department wouldn't be opened.
Back to Dell, many companies are simply procuring equipment from Dell. The most classic display they sell is the Dell UltraSharp 24" IPS display, which is really good and really affordable.
London is the biggest tech hub in Europe with the most tech companies, quite of few of which are very serious about equipment because tech culture. I've not seen a company that didn't have dual displays since I moved here. I can't imagine a company that can't buy a display if you tell them what do buy. I don't want to jump into "just leave your company" because it's a bad HN trope, especially in COVID times, but come on, if your company can't procure a display/chair you can find a better company.