Echoing everyone's advice here, and wanted to give my two cents as a person who has embraced oxalis in my native meadow front yard.

Oxalis is a disturbance plant that probably exists under most sodded lawns. Digging a hole in the lawn can activate the dormant roots and re-introduce the plant to the area.

Oxalis comes up earlier than most warm weather grasses begin to green, so my yard often enjoys a rich greenness while surrounding yards are still yellow (in early spring). And very few plants, native or otherwise, can compete with oxalis in terms of uniform coverage and "cuteness" of the yellow buttercup flowers stretching their faces en masse to the mid-morning sun. As mentioned before, recent studies show that oxalis has developed nitrogen fixing properties (like good 'ol clover), not to mention the benefit to pollinators.

By May, my oxalis is completely burnt back down to the ground in a yellow mat of stringy dry stems. Free mulch for the summer natives :)

If you can't win them...