My Ubuntu mobile BQ E4.5 allows in System Settings to switch-on with one single tap the Hotspot mode and the mobile works as an AP on Wifi and routes all IP through its data mobile. See below. Is there a way to do this with the L5 Byzantium? [screenshot20211213_110212493]

You can enable hotspot in Settings -> Wi-Fi -> ⁞ (top-right menu) -> Turn On Wi-Fi Hotspot (you must enable wifi by toggling the switch near the ⁞ for this to work).