Sri Lanka Navy officially took delivery of the EX-United States Coast Guard Cutter, USCGC Douglas Munro, provided by the United States, on 26th October 2021. Subsequently, she was designated with the Pennant Number P 627 in SLN Fleet and underwent certain modernization equipped to suit the operational needs of the Sri Lanka Navy. The ship departed for Sri Lanka from the Port of Seattle, United States on 03rd September 2022.
Sri Lanka now has three former US Coast Guard cutters, two 378s, Sherman and Douglas Munro, and a 210, the former USCGC Courageous.
Wikipedia has a listing of where the 378s are now.
Chuck Hill's CG Blog 
Are any former USCG cutters going to sea museums here in this country, or, is GSA selling them all?
The two most significant cutters are former USCGC Taney in Baltimore and Ingham in Key West.
https://en.wikipedia.org/wiki/USCGC_Taney_(WHEC-37)
https://en.wikipedia.org/wiki/USCGC_Ingham_(WHEC-35)
There are an awful lot of light ships preserved as museums.
Don’t know of any cutters built after WWII that have been preserved.
Would be nice to add a 95 or 82 to a larger collection of ships somewhere.
San Diego, California has a sail training ship that is a reproduction of a Revenue Cutter.
https://sdmaritime.org/visit/the-ships/californian/
The former USCGC Douglas Munro is commissioned into Sri Lanka Navy. It has been a long process. https://militaryleak.com/2022/11/25/us-donated-sri-lankan-navy-slns-vijayabahu-p627-commissioned-in-colombo-harbour/