Accessibility service for 3rd party apps not showing

edited September 2020 in ZenFone Max Series
ZF Model: ZC520KL
RAM: 3G
Firmware/APP Version: WW-AOSP-16.0200.1907.18
Frequency of Occurrence: All the time
Rooted: No
APP Name: Setting
Screenshot: https://us.v-cdn.net/6031231/uploads/ww_attachments/202002/05/131343zjqqvv40mr4jqr0m.png

I installed the BETA AOSP android 9 Pie on my device. I installed few apps that requires accessibility service to work. As i navigate to Settings>Accessibility, there's no accessibility services from the 3rd party apps that were installed. Help me, this happen to all 3rd app that, i guess this is not an app specific bug but instead a bug that exists in this firmware build.

-danish.

Thanks
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