You didn't mention the price. So I looked at Shopee and only got one result for used R75TA8G

⚠ RM572
⚠ Ryzen 7 4800HS, NVMe 512GB, 16GB, GTX1650Ti, IPS 100% sRGB
⚠ 2 months old seller
⚠ "10/10 condition" but super cheap full set
⚠ "Order via whatsapp only"

IF this is the exact product that you're looking for, don't you think this is too good to be true? This can be either a stolen laptop (which is kinda fine I guess...), or a scam. I bet it's a scam. At this point I wouldn't think too much about warranty or even power adapter..