The drive uses the M.2 2280 form factor, which makes it 22 mm wide and 80 mm long.
Like most M.2 NVMe SSDs, the Acer FA100 connects to the host system over a PCI-Express 3.0 x4 interface.
On the PCB, you'll find the controller and four flash chips.
On the back of the SSD, Acer has put a sticker with copper foil inside. While it's not a proper heatsink, it probably helps spread the heat over a larger surface area.
Chip Component Analysis
We've seen the Innogrit IG5216 controller before, on the Lexar NM620. It has four flash channels and supports the NVMe 1.4 specification.
The four 3D TLC flash chips are rebranded by BIWIN; my best guess is they are Micron 64-layer 3D TLC.