SelectButton: Material, Lara & Nora Theme - When disabled selected option is not visible

[can-oezkan]

Describe the bug

When the SelectButton is disabled it is impossible to tell which the current selection is:

I have provided a stackblitz example but the bug is also reproducible on the showcase site by switching the theme: https://primeng.org/selectbutton#disabled

Pull Request Link

No response

Reason for not contributing a PR

• Lack of time
• Unsure how to implement the fix/feature
• Difficulty understanding the codebase
• Other

Other Reason

No response

Reproducer

https://stackblitz.com/edit/github-pdvg2klr?file=src%2Fapp%2Fapp.component.html

Environment

stackblitz

Angular version

v19

PrimeNG version

v19

Node version

No response

Browser(s)

No response

Steps to reproduce the behavior

1. Add selection to SelectButton
2. disable SelectButton component
3. selection is not highlighted which makes it impossible to tell the current selection

Expected behavior

When the SelectButton is disabled the current selection should still be visible