How to expand mirror after installing larger disks with autoexpand off

After a disk failure, I replaced two 2T disks with new 4T disks in a two disk mirror. All went well, except I forgot that autoexpand was off and the pool size did not increase. Now that I have set autoexpand on, I’m not sure how to make the pool expand to the available disk capacity. Any suggestions?

System: Ubuntu 22.04
zfs --version: zfs-2.1.5-1ubuntu6~22.04.1