@TechWiz I’ve been a user of Revolut for quite a while and I recently got a notification that they launched in the US. It’s amazing what they offer! One down side to it is, that for privat users (which are for free) you can only do stuff on their iOS or Android app (no windows or browser app). For bsuiness clients you can manage stuff via via browser but that type of account isn’t for free.
Isn’t Liquid Layouts what you should really be looking to use? See a nice and detailed explainer here https://www.laralee.design/indesign-liquid-layouts/
The straight answer (but the incorrect way to use…) for your question might’ve been Cross-references like mentioned here https://indesignsecrets.com/synchronize-text-in-more-than-one-place-in-an-indesign-document.php