According to Q-FFF theory, The origin of UDFs Ultra Diffuse Galaxies and galaxies without Dark Matter is created at a new physics white hole created between multiple external GABHs ( Galaxy Anchor Black Hole) still unobservable. perhaps by the JWST.
Zoomed-out Hubble view of NGC 1277, which lies near the center of the Perseus cluster of over 1,000 galaxies, located 240 million light-years away from Earth. (Image credit: M. Beasley(Instituto de Astrofisica de Canarias)/P. Kehusma/NASA/ESA)
Also in the Virgo Cluster, there are UDF potential locations (white holes) without Dark Matter..
New physics ''white holes'' are assumed to be vacuum oscillation polarization points between two or more Black Holes also between GABHs.
Below: NGC 1052-DF2, an ultra diffuse galaxy. (UDF) located near the Galaxy cluster: NGC 1052. which seems to be the origin of the galaxy.
See also the Bullet Cluster for GABH effects on dark matter lagging after galaxy cluster merging.
The lagging seems to be created by the absence of Dark Matter Black Hole Mass. left behind in the middle of the Bullet cluster.