Median blur node up to 500px distance like in Photoshop please

Please add a node working similar to Photoshop Median blur  that works not just 5x5 pixels but 500x500.    I have no idea how it works  In Photoshop but assume there is some trick there . Since when I asked chatGPT to build me one for Designer   it came slow as hell and unusable while  do the job right more or less .    I wish we would have sometimes like Median and Bilateral blur live effects in Affinity 3.2. They work  perfectly real time there.    Please Adobe make such  nodes for Designer .   A combination of those blurs  is  so much less halo producing  when used for freq separation   and light /color equalizing.     Surely if both Photoshop and Affinity could do it  there might be some known way .