forms - Fixed width for buttons or proportional with the text

What is the best practice for a UI, to make all the similar buttons with a fixed-width, no matter how long is the text (with the condition to fit) or make the width proportional with the text and a

Margin and padding : overview and rules

Vertical text alignment in buttons and inputs

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Best Practices for Designing Buttons, by Nanzing Johnmark

html - Make button width fit to the text - Stack Overflow

Form – Carbon Design System

Studio Editor: Setting the Size of Your Elements, Help Center

How to layout a column of buttons with their widths equal to the width of the widest one in Flutter? - Stack Overflow

How to create buttons of fixed width using CSS - Quora