Use the built-in Mobile Hotspot feature (Settings → Network & Internet → Mobile Hotspot). Note that Windows may disable the adapter if it doesn't support hosted network (check with netsh wlan show drivers ).
The Realtek 8188GU driver is stable under Linux when using the correct source. The native rtl8xxxu driver suffices for basic connectivity, but the DKMS-based rtl8188gu driver provides better throughput and AP mode functionality. Future kernel versions (≥6.0) are expected to integrate full support without manual patching. realtek 8188gu wireless lan 802.11n usb driver