2 measure and 4 measure repeats
I wonder if there is a formal feature request for this. It has been discussed before (https://musescore.org/en/node/279638). This is absolutely crucial for pop/rock/funk/jazz music. In my book it's musescore's major weakness. Everything else is on par (or better) than sibelius or finale, in those styles.
PS. There is a workaround for 2 measures (https://musescore.org/en/node/103336) but it doesn't show the 2-measure repeat symbol which must be visible in the score. Repositioning the repeat symbol and programming 2/4 bar repeats is not a solution either because it is extremely time consuming.