First I would like to mention that I don't know if these times are typical for pull requests to be reviewed and approved. I am a new graduate who recently joined the company a month ago. I've had 3 pull requests open, one starting from the beginning of this week. None of these pull requests are huge. I've also had no new work items.
I asked my mentor and tech lead (who both assigned these tasks to me) yesterday if they could review the pull requests and if there were any new work items for me. I was told by my tech lead that I wouldn't have any new work items until the pull requests were closed and to "go ping the right person" to have them reviewed. This surprised me, as I'm new and have no idea who the "right person" is besides the people who assigned me the tasks. I asked and was given the point of contact, only to have the point of contact say they weren't familiar with the code base at all and couldn't review the pull request at all.
At this point, I'm not sure what to do. I feel like dead weight. They are reviewing other pull requests but tell me they don't have time for mine and aren't the right people (they are very familiar with the code bases though) to review it. There are also no formal sprints or standups, which I was used to before at my internships, and this means there is no formal review of pull requests that I was used to before. I have a weekly 1-on-1 with my manager since I am new, and he also gave the sentiment of "trying to find the right person" to review the requests. What should I do?