Remix.asia ... 

Android Studio Dolphin | 2021.3.1
Build #AI-213.7172.25.2113.9014738, built on September 1, 2022
Runtime version: 11.0.13+0-b1751.21-8125866 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11 10.0
GC: G1 Young Generation, G1 Old Generation
Memory: 1280M
Cores: 8
Registry:
    external.system.auto.import.disabled=true
    ide.text.editor.with.preview.show.floating.toolbar=false

https://romannurik.github.io/AndroidAssetStudio/index.html
の Launcher icon generator で応急処置。ここでダウンロードし、下記のフォルダ内
/app/src/main/res/mipmap-hdpi
/app/src/main/res/mipmap-mdpi
/app/src/main/res/mipmap-xhdpi
/app/src/main/res/mipmap-xxhdpi
/app/src/main/res/mipmap-xxxhdpi
の
ic_launcher.webp
ic_launcher_round.webp
を削除、
ic_launcher.png
ic_launcher_adaptive_back.png
ic_launcher_adaptive_fore.png
を配置。
/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
内の

<background android:drawable="@drawable/ic_launcher_background" />
<foreground android:drawable="@drawable/ic_launcher_foreground" />

を ↓

<background android:drawable="@mipmap/ic_launcher_adaptive_back"/>
<foreground android:drawable="@mipmap/ic_launcher_adaptive_fore"/>

へ変更で完了。

　ちなみに、

Android Studio Dolphin | 2021.3.1 Patch 1
Build #AI-213.7172.25.2113.9123335, built on September 30, 2022
Runtime version: 11.0.13+0-b1751.21-8125866 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11 10.0
GC: G1 Young Generation, G1 Old Generation
Memory: 1280M
Cores: 8
Registry:
    external.system.auto.import.disabled=true
    ide.text.editor.with.preview.show.floating.toolbar=false

で、バグ？は解消。