Solution #1 – Copy and Paste

Copy following superscript or subscript numbers:

Superscript Numbers: ¹²³⁴⁵⁶⁷⁸⁹⁰

Subscript Numbers: ₀₁₂₃₄₅₆₇₈₉

Solution #2 – VS Code Plugin

Install Fast Unicode Math Characters plugin.

To convert a portion of text to a superscript or subscript just type \_123 or \^123 + [tab]. This will display ₁₂₃ or ¹²³. For a full list of supported subscript and superscript characters see here.