Was the Sun's gravitational lensing observed in other solar eclipses than the one in 1919?
Yes, observations of this kind are within the technical scope of amateur astronomers.  Several groups succeeded in replicating the experiment during the 2017 eclipse that crossed the USA.

For example Donald Bruns measured deflections of 2.8 arcseconds of multiple stars. 

Nasa published a "How To" page for anyone wanting to test GR themselves.