Those who are rich enough have another solution: Figure out who has to be paid to make it happen, then build a wall of steel-reinforced concrete:

https://www.delmartimes.net/news/story/2021-06-11/seawall-ap...

Push the problem of keeping the sand above water by lobbying for routine dredge-and-pump operations to bring sand up from offshore:

https://www.sandiegouniontribune.com/communities/north-count...

No one will ask how or why such sand made its way offshore in the first place ...