There[SQ]s no widely known or officially distributed Android keyboard app called "Frozen Myanmar Keyboard." It[SQ]s possible :

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It[SQ]s a very obscure or newly released app:

Many smaller keyboard apps exist, and some might not have a large user base or much online presence.
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The name is slightly different:

The app might have a similar name but with a slightly altered title (e.g., "Frozen Myanmar Keyboard Pro," "Myanmar Frozen Keyboard").
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It[SQ]s a non-official app:

It could be a custom-built keyboard or one found on less reputable app stores. Be cautious when downloading apps from unknown sources.

To find a Myanmar keyboard for Android, you should search the Google Play Store directly for "Myanmar keyboard" or "Burmese keyboard." Many reputable options will appear. Look at the ratings and reviews before downloading any keyboard app.