Welcome to the forum, eliobaruch.
I tested up to 10 meters (for 1.5Mbps); however, according to the specification in the NRF52840, the range should go much further.
At further distances (>100m), if you experience issues with packet loss, you may want to consider the PHY RADIO MODE. This will require some added configuration with the registers in the RADIO such as PDUSTAT. I recommend this over traditional ACKing if you're really trying to maximize the data output over those distances.
ACKing is possible in the RADIO. Refer here for an example you can work with.)
For transmission to a mobile device or PC, I do not believe it is possible for your computer to receive under Nordic's proprietary radio mode; however it definitely is via GATT (with a high throughput cost). Because the NRF52840 allows one to customize protocols to their needs, you may want to investigate various protocols and see what works best with your constraints. I actually asked Nordic awhile back on some recommendations while I was working through the design.
Let me know if this helps.
And let this thread know about your updates!