How to force a page reload remotely after a deployment but there's already a code that has no refresh code deployed? [closed]

This question might be a general web development question but our code is written in reactjs and hosted in S3 via CloudFront, as our back-end is written in nodejs hosted in aws as well.

We have a code that's displaying a web page in different LED screens in different locations. We're hosting the content in those screens but we're do not have control of the hardware. We basically forgot that we need to do a force page reload programatically everytime we do a code release or deployment, if that's your term. So our code right now is not aware to refresh when there's a deployment. We have made our code to do that already but we still need a force reload on every LED screens.

We are only vendors and doesn't have the direct access to those screens or computer running the displays, as mentioned above. We can ask our client to do the force reload for us but that's our last resort.

Is it remotely possible for us to do a force reload on the pages served in thise screens? To me it sound like we're hacking our own website, but maybe it's possible and some have tried it? Maybe it can be done via CloudFront?

To be clear, this is a legit problem and I'm not fishing for details about hacking.

Thanks in advance.