It does work with multiple rulesets but depending on how you’ve set up rulesets, they may override each other.
Perhaps post a support topic with screenshots of your rulesets before leaving a negative review?
There is also a debug mode which can be used to inspect how rulesets work. Please see here for instructions (works in www.remarpro.com version as well): https://wooelements.com/guide/conditional-shipping-pro-guide/#elementor-toc__heading-anchor-4
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This reply was modified 3 years, 1 month ago by WP Trio. Reason: added info about debugging