We have this 1-2 ft wide strip of grass between our driveway and retaining wall. It's supposed to be St.Augustine grass, but nothing much would ever grow there. About 5 years ago, we planted some white and yellow sweet clover in that strip. I love the smell of sweet clover.
The white sweet clover grows great in that strip, and attracts all kinds of pollinators and butterflies. We cut it down after it dies (Aug/Sep here), and the St. Augustine is now nice and thick under the sweet clover. For some reason we can't get the yellow sweet clover to grow.
Sweet clover can be invasive, so that was a concern, and we keep an eye on that, but ours hasn't spread beyond that strip.
We have a Texas Ranger shrub in the back yard that blossoms throughout the year. It too sits full of pollinators and butterflies when it blooms.
As mentioned above, there are a number of "longer term" things that can be done to help the pollinators throughout the growing season.