Thank you for your question.
Initially, the commitment was to have this extension in place by summer 2022. However, due to the pandemic, temporary measures were put in place to enhance the EI program and facilitate access. These temporary measures were applied until September 2022. Because of these measures, many Service Canada resources had to be mobilized to put these measures in place, but also to meet the higher than normal demand.
This explains why the implementation of the extension to 26 weeks of benefits was delayed until the end of 2022.