Expansion is a scaling feature of the inherent dimension of time. This dimension has a constant total value in the whole universe, forming a continuous field. Every space has a scaling value, without exception. Remove the scaling value, and there is nothing.
Every space has a certain configuration, even the volume of a black hole is only the accumulation of space values. This means that every space is affected by a series of changes, no matter how small or scattered these changes are.
There are several kinds of time distortions around black holes, because these distortions shape all the fields. However, you should pay attention to the fact that the background is replaced by a completely occupied volume. Gravitational lenses can't stop anything. It just isolates the short viewing angle of a closed space from light or anything that tries to pass through the space.
Hypersurfaces have no surface gravity because they are not mixed with volumes. This effect is caused by strong interaction. Focus on the same center of gravity to form the same plane of motion. This plane defines the timeout evaluation of the hypersurface and sets the position of the event horizon. The mass in contact with the horizon adds a time mass, which calls another mode for the surface and produces a quantum transition that separates the time value from the space value. Time values are added to the hypersurface and space values are added to the volume.
From the observer's point of view in the static frame of reference, the more gravity an object receives, the slower its time passes. According to the "gravitational time dilation effect", when we observe that an object is approaching a celestial body with great gravity, such as a black hole, the time will pass more and more slowly as the object gets closer to the black hole. Because the gravity of a black hole is almost infinite, the time of an object will infinitely approach zero. So, from our point of view, it seems that this object will never enter a black hole!