Clearly (hah!) the words "Safari Technology Preview" (compared to just "Safari") and "Develop" took up enough inch space on the menu bar that it squeezed out the icons you wanted. Interesting occurrence.
🤦ðŸ»â€â™‚ï¸ Obviously I was so busy looking at the trees I didn't notice I was in the forest. Color my face red
Right. If that's it, they should have abbreviated it or used a smaller font.
The font on the menu bar is beyond the control of the application. It is set by macOS and any change will effect every app that uses the menu bar.