In my life my perceived productivity drops when I'm assigned many projects, each one takes more calendar days because I have to make progress on multiple fronts

In my life my perceived productivity drops when I'm assigned many projects, each one takes more calendar days because I have to make progress on multiple fronts, switching time, multiple more meetings with PMs and stakeholders per week BUT due to my experience the end result is closer to what the stakeholders have in mind and my projects run in production with fewer issues. I've discussed this with my leadership and they understand and are fine with longer timelines that result in higher quality work.