Rowling was great for branding, but not good for internally consistent worldbuilding. Hogwarts has anti-tech wards, but its never specified whether a Glock 9, a Bic rollerball, A CANON EOS 35MM, or a TI-84 Graphing Calculator would work. Each of them work based on widely differing physical mechanics. Are they independently warded, or are they waved away by the category tech?
The common consensus regarding the HP books as they are is that in a muggle war, the international community would quickly dominate, and magical secrets would fall into the hands of billionaires like Bezos and Musk, who could muster far greater cruelty and misery than Voldemort's ambitions, all in the name of profit.
The reason there's a codefied masquerade is to keep magic exclusively in the hands of less creative more sensible minds.