It’s not a different font. Special Unicode block.

Fraktur:

https://en.wikipedia.org/wiki/Fraktur

Unicode does not encode Fraktur as a separate script. Instead, Fraktur is considered a “presentation form” of the Latin alphabet. Thus, the additional ligatures that are required for Fraktur typefaces will not be encoded in Unicode: support for these ligatures is a font engineering issue left up to font developers.

There are, however, two sets of Fraktur symbols in the Unicode blocks of Mathematical Alphanumeric Symbols, Letterlike Symbols, and Latin Extended-E. The long s, ß, and the umlauted vowels are not encoded, as the characters are meant to be used in mathematics and phonetics, so they are not suitable for typesetting German-language texts.

𝔄 𝔅 ℭ 𝔇 𝔈 𝔉 𝔊 ℌ ℑ 𝔍 𝔎 𝔏 𝔐 𝔑 𝔒 𝔓 𝔔 ℜ 𝔖 𝔗 𝔘 𝔙 𝔚 𝔛 𝔜 ℨ𝔞 𝔟 𝔠 𝔡 𝔢 𝔣 𝔤 𝔥 𝔦 𝔧 𝔨 𝔩 𝔪 𝔫 𝔬 𝔭 𝔮 𝔯 𝔰 𝔱 𝔲 𝔳 𝔴 𝔵 𝔶 𝔷𝕬 𝕭 𝕮 𝕯 𝕰 𝕱 𝕲 𝕳 𝕴 𝕵 𝕶 𝕷 𝕸 𝕹 𝕺 𝕻 𝕼 𝕽 𝕾 𝕿 𝖀 𝖁 𝖂 𝖃 𝖄 𝖅𝖆 𝖇 𝖈 𝖉 𝖊 𝖋 𝖌 𝖍 𝖎 𝖏 𝖐 𝖑 𝖒 𝖓 𝖔 𝖕 𝖖 𝖗 𝖘 𝖙 𝖚 𝖛 𝖜 𝖝 𝖞 𝖟

𝖕𝖗𝖔𝖇𝖆𝖇𝖑𝖞 𝖜𝖎𝖙𝖍 𝖎𝖗𝖗𝖊𝖌𝖚𝖑𝖆𝖗 𝖊𝖝𝖕𝖗𝖊𝖘𝖘𝖎𝖔𝖓𝖘 https://github.com/MobileFirstLLC/irregular-expressions

Far less sophisticated than Tacoma (I don’t know how to link people) suggested. It’s just a web page my gf showed me years ago where you paste text and copy one of dozens of variations. She used it to make her Instagram posts 𝓯𝓪𝓷𝓬𝓲𝓮𝓻. I just use it to make my post more German.