macOS Sequoia 15

Find text on a webpage in Safari on Mac
You can find a word or phrase on a webpage.
Go to the Safari app
on your Mac.
Click
in the Smart Search field, then choose Find.
Enter the text you want to find.
Click the pop-up menu, then choose to search for text that contains or begins with what you enter.
Click
or
to see each instance that matches what you enter.
Click Done.