It is true.
The explanation:
\Program Files\MATLAB\R2019b\toolbox\matlab\ops\relop.m is gone in R2020a, that is why "help relop" won't produce in R2020a. The .m file contains only those help text.
But C:\Program Files\MATLAB\R2019b\toolbox\matlab\ops\Contents.m still exists in R2020a.
So you can do the following to bring relavant infomation.
help ops
help ||
help &&
and many more special characters