五笔字型 practicing Apps?
The reason that you can't find is simple:  Wubi is not popular anymore.  It was created specially for a group of elders, your grandparents generation whereas they are good in writing but very bad in standard pronunciation be it Pinyin or 注音 (Zhuyin) and too old to memorize Cangjie (仓颉).  It totally disappeared when hand writing using touch screen came out.  I am 71 now.  I never used it.  With 双拼 and 模糊拼音 functions created, it is even less efficient in input.