Create hairpin with open starting point? Or run hairpin through dynamic marking?

Thank you so much for this creative solution! I used your instructions, and adapted them slightly for Musescore 4. I'm putting updated instructions here in case anyone else comes across this thread.

CONCEPT:
We're putting a paper-white box or circle around a dynamic marking, then putting that dynamic in the middle of the hairpin.

INSTRUCTIONS:
1. Place dynamics and hairpins approximately where desired
2. Select dynamic that should interrupt hairpin
3. View > Properties

Then, in the Properties sidebar…
4. Uncheck “Auto-place." You can now move the dynamic marking around to your desired location.
5. Show more > Frame: click either the box or circle
6. Beneath “Border”, click the colored box. Select your new desired color. (Use the eyedropper tool to get the same white as your score page)
7. Repeat for Fill Color. (On my version, Fill Color seemed to have no color box to click. But I just clicked where the color box should be and was able to select color as I did for the border)
8. Adjust Padding as desired. (I used .3-.5)

Now, select the hairpin, and look at the Properties sidebar again.
9. Click “Appearance”
10. Under Arrange, click “Backwards.” (This places the hairpin behind your dynamic marking)

PROBLEM:
Even though I used the eyedropper, I found that the frame becomes slightly grayer than the rest of the page after PDF export. Not sure how to solve.

FEATURE REQUEST:
It would be nice if this was quicker to achieve, perhaps with the ability to manipulate the hairpin opening, or an automatic adjustment when dynamics are placed inside a hairpin. I've created a feature request here: https://musescore.org/en/node/372736