In anachoages in the med they have problems of humans and seagrass interaction aswellLike most other similar projects it’s controversial. See the sticky thread on Studland.
Believe they tried it in Plymouth and it didn't work in a lot of areas.Apparently the first major Seagrass rewilding project in the UK, Dale bay started back in 2019-20
https://www.projectseagrass.org/dale/