CBRE Toronto Q2 2023 "Vacancy moderated in Q2 2023 as net absorption came in at -124,806 sq. ft. As such, overall vacancy increased only by 10 basis points (bps) from 15.0% in Q1 2023 to 15.1% in Q2 2023." (quoted from CBRE link below)
Link: https://www.cbre.ca/insights/figures/toronto-downtown-office-figures-q2-2023
Download the PDF available on the linked webpage for more comprehensive data.