Linkedin does let you use the same GDPR mechanisms built for compliance even if you live in the US. I work there, not in these systems, but a bunch of development effort goes into maintaining meta-data. This is so systems can accurately auto-purge information when people close accounts or power the ability to export your data and make it as easy as possible.

Download your data. https://www.linkedin.com/help/linkedin/answer/50191/download...

Close your account. https://www.linkedin.com/help/linkedin/answer/63