How to interpret escape characters in a string and display them as newlines, color etc

i grep something like:

str='"a\nb"'
echo ${str} | grep -E -o '".*"'

and got:

"a\nb"

i wish the result displays like:

a
b

how could this be done? thanks p.s. actually, the str is

str='"\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\r\33[1A\33[K\33[32m[58,378 / 59,145]\33[0m 12 actions running\n    Compiling interface/detail/type_support.c; 5s linux-sandbox\n    Compiling interface/detail/type_c.cpp; 5s linux-sandbox\n    ; 2s linux-sandbox ...\n"'

i think the \33[...part is related to color on shell, which is more complicated...could the \n and \r as well as color display as human-readable by grep or jq?