Is there an advantage to the equatorial region of the far side of the moon for a radio telescope or would any crater on the far side work? If nearly any crater on the far side of the moon will work, and not just equatorial craters, then we could pick craters near the possible future Artemis base at the South pole which would allow easier access.  My assumption is as long as the crater is outside the range of Earth and the satellites in orbit it would be essentially the same as an equatorial crater.
tl;dr: The less complicated you want to make your dish, the closer to the equator you want to put it.

Since you are asking about single craters I assume this question is about using a crater as a natural pre-form for a single, large dish antenna like Arecibo Observatory and FAST.
On the Moon with no atmosphere or ionosphere nearly the whole sky is available for good signal, but as you move away from the current zenith position (i.e. &quot;straight up&quot;) there are several problems. One is that the effective area of the telescope may be reduced for geometrical reasons at steep angles, and the other is that the optics of getting a good focus is increase.
Below you can see that Arecibo can't look much beyond 18° away from the zenith, and while the much newer and more complex FAST dish with it's changing dish shape articulated by moving cables and actuators can go as far as 60° away, it loses useful collection area beyond 26° not even counting $\cos(\theta)$ losses.
You will also notice that each telescope's maximum zenith angle attempts to be larger than the geographical latitude of its location, so that it can see the ecliptic.
Moving your lunar dish near the poles means you will lose access to a lot of the sky and be restricted to a &quot;cap&quot; of declinations either near +90° or -90°.
So the less complicated you want to make your dish, the closer to the equator you want to put it.
Arecibo
From Overview of the Arecibo Observatory; ALFALFA, Undergraduate Workshop , Gregory Hallenbeck January 14, 2013

Latitude: 18° 20′ 39″ N
Can move dome to zenith angle position of 19.7°, But only to ~18° with good performance

FAST
From Wikipedia:

Latitude: 25° 39′ 11″ N
The maximum zenith angle is 60-degree when the effective illuminated aperture is reduced to 200 m, while it is 26.4-degree when the effective illuminated aperture is 300 m without loss.33,3
Although the reflector diameter is 500 metres (1,600 ft), only a circle of 300 m diameter is used (held in the correct parabolic shape and &quot;illuminated&quot; by the receiver) at any one time.22 Thus, the name is a misnomer: the aperture is not 500 m, nor is it spherical.
3Project FAST
22The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
33The optics of the Five-hundred-meter Aperture
Spherical radio Telescope