Daniellejg12 If you want to stay under £400, any of these would be about equal to the others. These should run Sims 4, all packs included, on medium-high to high graphics settings, and you'll have enough room for a substantial custom content collection:
https://www.currys.co.uk/products/acer-aspire-3-15.6-laptop-amd-ryzen-5-512-gb-ssd-silver-10257697.html
https://www.currys.co.uk/products/acer-aspire-3-15.6-laptop-intel-core-i5-512-gb-ssd-silver-10258233.html
https://www.johnlewis.com/asus-vivobook-15-laptop-intel-core-i5-processor-8gb-ram-512gb-ssd-15-6-inch-full-hd-silver/p111268563
You don't need to spend more money, strictly speaking. But if you want to bump up the performance a bit and also get 16 GB RAM (not required but nice to have), this one is not too much more expensive:
https://www.currys.co.uk/products/acer-aspire-3-15.6-laptop-amd-ryzen-7-512-gb-ssd-silver-10258102.html
Beyond that, you'd typically need to spend more like £600-650 to get better performance in gaming.
For comparison's sake, the graphics chips in the first three laptops I linked are about 30-35% faster in gaming than the chip in the first laptop you linked in your original post. That's not a lot for the extra £100, so if you'd rather keep the price down, the first option is a reasonable purchase. But if you're looking for the best you can get for under £400, one of the ones above is clearly the better choice.
The graphics chip in the last one I linked is about 15-20% faster in gaming than the chips in the first three, so again, not a huge improvement for the extra cost, but you do get the extra RAM too.