Unfortunately, this is not possible. This is because Android devices do not permit the sharing of VPN tunnels with other devices. When you share your hotspot, your device's default IP address is your own.
When using a speedy VPN and sharing a connection, however, there is a significant difference in performance. Sharing a hotspot typically slows you down significantly. This is because the signal must go through another device before reaching the target device. Therefore, it is preferable to utilize a VPN with extremely quick speeds (like ExpressVPN).