@Mary Wilson yeah your concern is totally valid — a warehouse with 15-20 APs plus Zigbee is genuinely one of the harder RF environments you can throw at a 2.4GHz link. The 50km spec is drone-to-drone with clear line of sight and no ground reflections, so that number isn't the one you should be planning around here anyway. For a ground-level indoor deployment you're looking at a much more conservative figure, and the 2.4GHz congestion will eat into your link budget on top of the physical obstructions.
That said, the MultiNav Pro+ isn't a standard BLE module — the receiver sensitivity and the external amplifier design do give it meaningfully better noise rejection than something like a commodity nRF52 breakout. The question is really how much of that advantage survives in a heavily saturated band. BLE uses frequency hopping across the 2.4GHz ISM band, so it's not sitting on a fixed channel the way a Zigbee device might, which helps. But if your WiFi infrastructure is running on overlapping channels and the noise floor is high enough, you'll still see range compression.
Honest advice: I'd do a quick spectrum scan before you commit to the deployment layout. Something like a Ubiquitous or even a phone app with a WiFi analyzer will show you where the dead zones in the spectrum are. If you can coordinate your BLE link timing or placement to avoid the worst congestion windows, you'll recover a lot of that practical range. Also worth thinking about whether your telemetry nodes need to be on the warehouse floor or if you can get even a few meters of elevation — that changes the link geometry considerably.
