SSD slot for Dell Vostro 5383 NVMe or SATA M.2

Hello friends
I would like to upgrade my Dell vostro 5383 8th gen, core i7 laptop with SSD and it has M.2 slot for SSD but I'm not sure if it's SATA or NVME slot as NVME is better for the speed. (I'm greedy in terms of speed/performance)

I've checked laptop specs but it only mentions M.2 SSD and doesn't specifiy wether it's SATA or NVMe, I've also got in touch with dell support but they couldn't provide anything more than what is there in the product specs.

It's confusing as some users mention it's NVMe but want to be 100% sure before ordering SSD to avoid further headache.

Laptop specs link https://www.dell.com/support/manuals/en-in/vostro-15-3583-laptop/vostro_3583_setupandspec/storage?guid=guid-ef05619b-a6ea-4d9e-be41-85476096d8e0&lang=en-us

Service manual link https://dl.dell.com/topicspdf/vostro-15-3583-laptop_owners-manual_en-us.pdf

I've observed on mother board physically it looks like the slot is like NVMe drive but I'm not sure if it invovles more factor to check,

I'm also sharing images of the mother board and SS of product specs

specs SSmotherboard SSD port

Please let me know if you need more details to help me on this issue.

Thank you.