I am honestly interested in any examples you might have, cause I do spend a bit of effort keeping up with whether LLM releases are delayed or lack certain features in EU member states specifically and know no recent example of that.

GPT-5, Gemini 2.5 Pro and Claude 4 were released across the same time frame (staggered releases that affect users even within regions not withstanding) for EU and US customers.

ChatGPT Agents meanwhile had a three week delay, but that was not EU specific and affected other countries such as Switzerland as well. Previously, I have also seen the very much not EU UK included in such delayed releases.

Essentially, all recent LLM releases I am aware off either dropped simultaneously for EU and US customers or, if they were inaccessible within the EU early on, that generally included none-EU countries with different or no applicable regulation as well. Any example of differences in accessible features I know of hasn't been limited to EU member states.