To access a full range of Pantone colors in Adobe Illustrator, you must now use the Pantone Connect Extension. Adobe phased out most pre-loaded Pantone Color Books from its Creative Cloud applications in 2022, leaving only a limited selection of basic libraries available by default. Accessing Pantone via Pantone Connect
The primary way to get Pantone colors back into Illustrator is through the official plugin: download pantone colors for illustrator link
How to install a downloaded .ASE file:
Locate Files: On your computer, navigate to the folder for an older version of Illustrator (e.g., Illustrator 2022 or 2023): To access a full range of Pantone colors
Adobe has a support document titled "Restore Pantone swatches." You must manually download the .zip containing the old .ase files. Visit the Pantone Connect Website
Download Link: You can find and install it directly from the Adobe Exchange Marketplace. Free vs. Paid: