Newly formed stars will ionize and enrich the surrounding gas and thereby contribute to regulating the star formation cycle. However, fragmentation of the cloud means that stellar feedback is not perfectly coupled to the gas. The PHANGS survey provides a large sample of galaxies that is perfectly suited to study the different phases of the ISM, which is necessary to put constraints on this process. With PHANGS-MUSE we detect over 24,000 HII regions across 19 galaxies and with PHANGS-HST we identify a catalogue of over 15,000 compact stellar associations. Both catalogues are matched and we obtain a sample of 4,177 clearly matched HII regions and ionizing clusters. By comparing the observed Halpha flux to the number of ionizing photons predicted by stellar population synthesis models, we can quantify the leaking radiation. This allows us to measure the escape fraction for one of the largest samples of HII regions in the literature and study correlations with other properties of the cloud.