Thanks for reaching out!
TWT is enabled by default for all SSIDs, and BSS coloring is only available as a power-user option, via the “he_bss_color” option:
he_bss_color: BSS color (1-63)
#he_bss_color=1
he_bss_color_partial: BSS color AID equation
#he_bss_color_partial=0
Please see https://help.alta.inc/hc/en-us/articles/28851178801947-Implementing-Passpoint-using-OpenRoaming for more info on setting hostapd options.