If a freelancer has submitted work on Upwork and the client is unresponsive, there are a few steps they can take. Firstly, it's important to note that Upwork has a system in place that automatically releases funds to the freelancer if the client doesn't respond to the release request within 14 days of its submission. However, freelancers should avoid resubmitting the same milestone again to prevent the timer from resetting. Instead, they can simply wait for the funds to be released automatically. The Upwork community also recommends that freelancers refrain from sending additional messages to the client after submitting the work, as this can sometimes be seen as pestering. If the client is not responding, it's best to give them space and allow Upwork's automatic release system to take effect.
In the case of hourly projects, freelancers will still be paid for the work they've done to date, even if the client is not responding. If the client remains unresponsive for an extended period, it may be best to stop working on the project and wait for the client to make contact. It's important to keep in mind that unresponsive clients are not a new issue on Upwork, and that working the system correctly can help prevent payment issues from arising. If the client disputes the work and the freelancer believes they've completed it according to the agreed-upon terms, they have the option to file a dispute with Upwork. However, it's often best to try and resolve any issues directly with the client before taking this step. Ultimately, patience and persistence are key when dealing with unresponsive clients on Upwork.