1) Amazon is complicit in shady behavior on their platform, whether it's inventory commingling, sketchy sellers repurposing existing, well-reviewed listings for a totally different product or those bribing customers to leave good reviews with gift cards or free stuff.
2) The tech support number could very well be provided by the seller, and you could've bought the camera from a listing from said seller instead of the real Reolink (if the "real" Reolink even sells on Amazon to begin with). Maybe tech support scammers are now using this as a new lead-generation tactic ("legitimately" sell a high-maintenance product but scam anyone that calls for support?).