Note that this report might be based on perusing websites more than hands on evaluation.
That said, "Lenovo" laptops include the non-thinkpads, which tend to be *terrible* for repair-ability. For example, in many cases they don't consider the keyboard to be a part worthy of keeping replaceable without replacing half of the laptop, despite it being one of the most likely things for a user to break. You can get third-party parts that is just the keyboard, but you have to destroy a lot of plastic welds to even try, and there was never a design to put it really back together after you did that.
The Thinkpads tend to do pretty well, though increasingly the cpu and memory are "just part of the board now", but honestly that's just the direction of that industry in general. We are pushing physics, it's harder for us to do modular RAM at the speeds we want to interact with the RAM, LPCAMM is a thing, but even then you just have a single LPCAMM and it's less about 'repair' and more about being able to have different memory amounts by swapping the module out.