[gruez]

>The best would be probably to let the company cover the PC / tablet / phone costs as they are business expenses

Depending on how your local tax codes are structured and how strictly your local tax authority interprets them, letting the company buy the electronics and then subsequently using it for non-business use might count as a fringe benefit and therefore be taxable. In other words, if get your company to buy you a iPhone 15 Pro Max and a 16 MBP Pro with M3 Max, but all you're doing is some light macOS app development, they might (rightly) think that those aren't really being used for business purposes and are actually a sneaky way to remunerate yourself.