LinkedIn has made the process of finding an on-site position more difficult. They will list a position as being local to your search, but when you view the listing, it will actually be for a remote job. There is no way to really search for on-site jobs in LinkedIn.
This is definitely a recent change they did, because I had a job alert that went from getting a new truly local listing every few weeks to 50+ listings a day with all of them being remote. In the "All Filters" section, there's a new On-Site/Remote section where you can exclude remote listings now in the job search tool.
Offices are still closed, so many companies still do not know how they will truly operate once they will re-open.