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keyman
Keyman cross platform input methods system running on Android, iOS, Linux, macOS, Windows and mobile and desktop web
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
From your description, yes, it sounds like your concerns revolve around deficiencies in existing keyboard layouts and possibly fonts, whereas Unicode is not concerned with those things (it has an influence on them, but is not a standard about font design or input methods). You could potentially mitigate the keyboard issue by creating your own custom layout with something like Keyman. The font part is harder because making fonts is...well, hard — but you might check out some open source font projects that support Coptic (like the Noto project), file an issue, and maybe let folks know of your willingness to provide guidance and advice even if you're unable to do the actual font work.
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