how letters and shapes are designed

Explain the question is a rather difficult process so please understand the question carefully, before starting the question, you should know that I have searched for an answer everywhere and for many months. I search and find no information, I am interested in the (Adobe InCopy) program and this will be my great question about it

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my question is, how develop a new keyboard language for your phone?

what I mean is how I can design those new letters of words that I can type anywhere on the phone or computer

"I will ask other questions to understand my question"

how can I make forms like this ☟

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█████▒▒▒▒▒▒▒▒

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▄▄▄▄▄▄▄▄ • ▄▄▄▄▄▄▄▄

❏ ❐ ❑ ❒ ❏ ❐ ❏ ❐ ❑ ❒ ❏ ❐ ❑ ❒

▇▇▇▓▒░      「✦」        ░▒▓▇▇▇

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and It can also be copied and pasted anywhere on the phone or computer so that it reads like any other character or one of the letters ..?!

"by the way I do not have enough information about Unicode , so that was one of the reasons I did not know the answer"

here was my question about designing shapes and letters, so I hope you understand what I mean ♡.