My fit is a 2018. I did not have to drill any holes and only had to modify the wiring slightly (just soldered in leads for reverse on passenger side), but mad it easily removable. Factory assemblies can be dropped back in no problem using original plugs.
inginuity time LED Tail Lights For Honda Fit Jazz 2014-2019 4PCS Start Up Animation DRL Sequential Indicator Black Rear Lamp Assembly (Smoke) https://www.amazon.com/dp/B08JG93SB9/ref=cm_sw_r_cp_api_glt_fabc_CBXZQ1XEYD08W0PH77ZB?_encoding=UTF8&psc=1
inginuity time LED Tail Lights For Honda Fit Jazz 2014-2019 4PCS Start Up Animation DRL Sequential Indicator Black Rear Lamp Assembly (Smoke) https://www.amazon.com/dp/B08JG93SB9/ref=cm_sw_r_cp_api_glt_fabc_ABZ4NBJ0EH03Q32JZQ9H?_encoding=UTF8&psc=1
Never go wrong with some led under glow lights.
Also I found these nice looking taillights on amazon. Might buy them for myself lol inginuity time LED Tail Lights For Honda Fit Jazz 2014-2019 4PCS Start Up Animation DRL Sequential Indicator Black Rear Lamp Assembly (Smoke) https://www.amazon.com/dp/B08JG93SB9/ref=cm_sw_r_cp_api_glt_fabc_GW40EGDEZG8BSX2T42P1?_encoding=UTF8&psc=1