LED means its getting power from the motherboard.  WRONG SSD choice though, machine supports faster NVME SSDs. The one you have selected works on SATA speeds 500 MBPS, while an NVME will give you up to 3500 MBPS   Same Brand Same price and you can something better LINK
The SSD the laptop came with finally pooched out and I bought a replacement for it. The SSD has a light on so I believe it is working and seated correctly in the slot, however, the SSD is not being detected by the BIOS despite me trying almost every setting. here are the specs: inspirion 15 7567 new SSD: Silicon Power 512GB A55 M.2 SSD (SLC Cache for Speed Boost) SATA III Internal Solid State Drive 2280(SU512GBSS3A55M28AC)
SSD not detected in bios