You do not type it from a keyboard; you copy it. Press the copy button above and paste it into any app. That is the whole point of Unicode styled letters.
Where can I use the Bubble Filled A?
Anywhere text is accepted: Instagram bios, TikTok names, Discord, WhatsApp, gaming profiles and documents. The full Bubble Filled alphabet is linked above.
What is the Bubble Filled letter A?
It is the letter A rendered as the Unicode character ๐ (code point U+1F150), part of the Bubble Filled styled alphabet. It is a single character you can copy and paste anywhere.