The answer is no. There are no resolved images at any wavelength of black holes or black hole candidates that demonstrate their lensing effect.
There are of course lensing images due to massive objects that probably have black holes at their centres (e.g. Courbin et al. 2010 and see below), but that is not the same thing.
A quasar acting as a gravitational lens - Courbin et al. (2010)
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