I don't think these devices are identical. For one, I own a "Yoga Slim 7 Pro 14IHU5" with an i7-11370H and a fairly prominent YOGA logo on its lid (it also came with the little Intel EVO sticker btw).
Besides that, there are a few notable differences compared to the Yoga Slim 7i Pro, just looking at the specs:
1) Screen. The IdeaPad you reviewed comes with a touch screen. The Yoga doesn't and it's not even a configurable option.
2) RAM clock speed. The Yoga has LPDDR4X-4266 RAM, the IdeaPad uses LPDDR4X-2133 according to your review.
3) Power supply. Just like the AMD-version, the Yoga 7i comes with a 95W PSU. The IdeaPad comes with the smaller 65W version.
4) GPU. The Yoga has an Nvidia MX450, the IdeaPad is apparently only available with Intel's iGPU.
There might be some more subtle changes under the hood, too (eg keyboard/touchpad quality) and it does indeed look like Lenovo reused large portions of the Yoga Slim 7(i) Pro design for this IdeaPad but the IdeaPad doesn't look like it's just the Intel version of the Ryzen-powered Yoga.