That's right. Intel HD Graphics 620 is supported in Windows 10 64 bit version 1709 and up, only. If you want to use Intel driver you shall update your Windows to Windows 10 64 bit, or, stay with Microsoft Basic Graphics Adapter.
The right thing is to address your question to Acer. However, is the Intel Driver needed to use screen projector with your laptop? The Microsoft Driver should be good enough.