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So one of the things I like to do is to find deep Hubble and JWST survey locations in the legacy survey to see what parts (if any are also visible here).
In case anyone is interested here as an article about this cluster: [2509.03912] A large thermal energy reservoir in the nascent intracluster medium at a redshift of 4.3
By the way in the paper they used a LCDM model with H0 = 67.7 km/s/Mpc, Omega_m = 0.31. This makes an angular diameter distance of D_A = 1420 Mpc, giving 6.9 kpc per arc second making the cluster about 138 kpc across. Hmm… that’s tiny!
However in a de Sitter model the cluster is about 320 kpc across making this still a small compact cluster about 10 times the diameter of the milky way.