Hi there,
We have deprecated and migrated the openedx/xblock-utils library into openedx/XBlock.
Please read Merge `openedx/xblock-utils` library into `openedx/XBlock` · Issue #675 · openedx/XBlock · GitHub for more information and to post any questions/comments. The proposed deadline for comments before acceptance is October 11, 2023.
Thanks, Muhammad Farhan Khan