To my eye Material applications on iOS looks like what applications should be doing - taking the HIG and improving on it in their own way.
It can also be attributed to laziness on the part of the PM and/or designer. Or in general, clients opting for cheaper solutions when hiring an agency to build apps for them.
I say all this to point out that, Android users often get the short end of the stick when it comes to app design. Often there is a strong lack of consideration on what is a native Android app feel. No consideration for the use of back-buttons, menus and UI elements using bottom navigations or custom ones instead of native Material design... Generally convergence is made for all kinds of reasons that ultimately leave Android users alienated.