I don't think I've encountered a single smartphone by a reputable vendor that has had significant issues sleeping, no matter the chip vendor or OS.
Meanwhile people do have serious issues with sleep even on Intel Macs running MacOS and Thinkpads running Windows. For whatever reason PC chip / hardware vendors just cannot get sleep to work properly. Apparently the problem is so low-level that even a company like Apple cannot paper over the problems without throwing out Intel entirely and using their own SoC in the new Macbooks.
Meanwhile people do have serious issues with sleep even on Intel Macs running MacOS and Thinkpads running Windows. For whatever reason PC chip / hardware vendors just cannot get sleep to work properly. Apparently the problem is so low-level that even a company like Apple cannot paper over the problems without throwing out Intel entirely and using their own SoC in the new Macbooks.