Here's a clear explanation of how to determine whether an Oppo A5 2020 & A9 2020 device has UFS or eMMC storage:

1. Check the Branch Model and OTA Version:
Open the Emergency Dialer and enter *#899#
Navigate to the "Software Version" section.
Locate the Branch, OTA, and PCB numbers.

UFS Devices (100% certain):

1) Branch Model: CPH1933 or CPH1937
OTA Version: CPH1931 or any

2) Branch Model: "CPH1941"
OTA Version: "CPH1941"

eMMC Devices (100% certain):

1) Branch Model: CPH1931
OTA Version: CPH1931

2) Branch Model: CPH1931
OTA Version: CPH1941
(Remember if OTA CPH1941 it's need CPH1941 firmware mustbe )

For example, some images are used below

Oppo Reno 2 Cph1907
System error Online Update stuck
No need isp
Done Thanks Phoenix Support team