Tee Higgins' Week 5 status is uncertain. He left late in Week 4 against Jacksonville with an adductor strain after putting up 11 catches for 157 yards. HC Zac Taylor called him "day-to-day," but adductor strains typically need 1–3 weeks to recover, so his availability for the Bengals' Week 5 game at Miami is genuinely up in the air pending further testing (from the Tee Higgins page).
Worth noting: Ja'Marr Chase is also in concussion protocol for Week 5, so if both sit, rookie Dohntae Myers would step into a major role. Keep an eye on practice reports later in the week.