Is there a way to remotely update a manual counter

https://www.thefilmfestivaldoctor.com/

We have a manual counter in the top right of the website. Whenever it needs updating the client emails me and I login and change the fixed value on the widget. Anyone have any ideas on how I can get the value to be changed through the wordpress app easily so the client can do it herself. Please bear in mind she’s not particularly technical.

https://www.ads-software.com/plugins/jellyfish-counter-widget/