Hangul doesnt work the same way since each character is a letter. The blocks are syllables and are automatic using rules.

In Korean (and I think some Chinese/Japanese keyboards) you can “build” the character, from building blocks like this

I’d say you’re not building the character, but typing in the characters one by one.

집, as you know from typing it, is three characters in one. All three components are distinct. They can’t stand alone, but that’s not much different than “c” not really being able to stand alone in English. (If we refer to the letter C, we often capitalize it)

In Japanese, people can easily type in Hiragana (their “alphabet”), and the Kanji can be suggested like with autocorrect. The sound is the same, but the visual is different.

Chinese is a different beast because they don’t have an “alphabet” of “letters” the ways that Korean and Japanese do.

(They’re not “alphabets”, but they do have elements that are much closer to letters than Chinese does)

Japanese is kind of similar. Although usually native speakers do not use an English keyboard. They use this:

Since Japanese has 5 vowels, each key here represents a consonant and can actually enter any of the 5 vowels by either tapping on it or flicking up, down, left or right on it. Once you’ve built the word you’re trying to write, you can tap on the auto suggested kanji or katakana or leave it as is in hiragana.

The exception is the bottom left and right keys which are for alternative consonants (I’m not sure the actual linguistic term) and punctuation which have fewer options but work similarly.

So if I’m writing the character for home, I’d flick the button toy he right of the emoji button left for い and then right for え. Once I have both hiragana characters, I just need to tap on the 家 character that appears above the keyboard.

Reminds me of whatever this is