Theo:David What apps can I look for to test your Spain Google Play Store country issue?

Theo:David What apps can I look for to test your Spain Google Play Store country
issue? <https://i.postimg.cc/gkqCRBf1/aurora-espanol.jpg>
On XDA Developers, the Aurora team told me that Aurora simply looks up what
the phone "thinks" is the country. But I don't have a Google Account and I don't have the Google Play Store
app on the phone, so I was wondering what Aurora Store used for the Google
Play Store country when it looked for the apps that Theo and David Wade
were looking for.
 <https://xdaforums.com/t/app-5-0-aurora-store-open-source-google-play-client.3739733/post-90011933>
They told me Aurora "uses whatever is set as locale on your phone or spoof
configuration if any."
I wasn't aware there's a default locale nor how to spoof it.
In Settings > General Management > Language", my Android 13 Galaxy phone
listed "English (United States)".
But Android 13, especially with Samsung's One UI, allows for per-app
language settings; so there must be a definitive programmatic way Aurora
uses to get the default locale.
Resources.getSystem().getConfiguration().getLocales().get(0)
Looking up a way for a user to figure out the default locale that Aurora is
going to use, I'm not sure, but perhaps the system "language & region"
settings are used to determine the default locale?
This reports, for example, my system locale is "EN-US".
C:\> adb shell getprop persist.sys.locale
     en-US
But this didn't report anything:
C:\> adb shell getprop persist.sys.country
I'm trying to help David Wade and the rest of us understand how Aurora
chooses what regional apps to make available to us.
As a test, tried to set my locale to Spain, to see if that changes
anything.
First, with the EN-US locale, with all filters off, I looked in Skyica and
in Aurora Store for David's suggested Spanish locale supermarket app.
 <https://play.google.com/store/apps/details?id=com.tempos21.eroskiclub.pro>
Neither finds the app.
I tried to use adb to change my locale to Spain.
 C:\> adb shell setprop persist.sys.locale es-ES
 C:\> adb shell setprop persist.sys.language es
 C:\> adb shell setprop persist.sys.country ES
 C:\> adb shell setprop ctl.restart zygote
 C:\> adb shell dmesg
Unfortunately all fail because my bootloader version is unrootable.
So I manually changed language/country in the Galaxy settings.
Android13: Settings > General management > Language > Add language >
(3dots) > All languages > Espa�ol > All regions > Espa�a
Set Espa�ol (Espa�a) as default language?
[Keep current] [Set as default]
To test if the changes took:
 C:\> adb shell getprop persist.sys.locale
      es-ES
Then I tried Aurora Store to see if that supermarket app shows up.
Drat! <https://i.postimg.cc/gkqCRBf1/aurora-espanol.jpg>
I was hoping that would work. But it still doesn't show up in Aurora.
I rebooted & try again. Nope. Still no go.
What did I do wrong?