Creeping thyme has trended online for the last few years as a low-maintenance, drought-tolerant, pollinator-friendly lawn alternative. That's mostly true.
The catch is that it's slow to establish, expensive, needs full sun, and struggles in humid southeastern climates.
The pollinator benefit is real but modest. European thyme didn't co-evolve with North American native bees. It feeds adult pollinators some nectar but isn't a host plant for any native caterpillar.
The native alternatives that genuinely support North American ecology:
Pennsylvania sedge (Carex pensylvanica): shade-tolerant, drought-resistant, soft underfoot, native to most of the eastern US. The closest thing to a true native lawn replacement.
Native violets (Viola sororia and regional species): already in most lawns as "weeds," host plant for fritillary butterfly caterpillars, tolerate mowing. Stop killing them.
Self-heal (Prunella vulgaris ssp. lanceolata): the native subspecies, not the European one. Short, pollinator-supportive, tolerates mowing.
Pussytoes (Antennaria neglecta): drought-tolerant native, host plant for American lady butterflies, low-growing.
Buffalo grass (Bouteloua dactyloides): native warm-season turf grass for the central US. Drought-tolerant, no fertilizer needed.
Frogfruit (Phyla nodiflora): native to the southeastern and southwestern US, supports buckeye butterflies, tolerates foot traffic.
Creeping thyme is fine if you want a low-water ornamental ground cover. For ecological function, it's better to plant what evolved here.