MeerKAT's Epic Image of the Galactic Centre, what are we seeing?
LaRosa et al 2000 present a 90 cm VLA image and catalog of sources near the galactic center.
Here is their schematic diagram with the 2&deg;x1&deg;, 18-33 cm band MeerKAT image region highlighted.



The compact source Sgr A* is a small dot within the bright, pear-shaped blob Sgr A right of center.
Recent millimeter VLBI images (Issaoun et al 2019) indicate a width on the order of 200 &mu;as, or 1/7000 of a pixel in the image you uploaded.

The bright pair of blobs left of center, Sgr B1 and Sgr B2, are massive molecular clouds.

Most of the bubble shapes are either supernova remnants (SNRs) or H II regions ionized by UV-bright young stars.
The far left pair Sgr D has one of each.

The various non-thermal filaments (NTFs) align with the local magnetic field and emit synchrotron radiation but are not well understood otherwise.
The bundle of filaments near the center of the image are known as the galactic center radio arc (GCRA) or just the Arc.