If you keep a variety of types and diameters of perches (rather than just wooden dowel rods and/or plastic perches) in your cage, then it is unlikely your budgie will develop bumblefoot. The platform you described will be fine as is.
Utilizing natural wood perches and various other perches in your budgie's cage, such as the ones below, is recommended:






Utilizing natural wood perches and various other perches in your budgie's cage, such as the ones below, is recommended:





