Chaiwa won the Swiss Super League with BSC Young Boys after they thrashed Luzern 5-1 at the Stadion Wankdorf.
The 19-year-old Zambian played 90 minutes as his team won their 16th league title with five games remaining.
Chaiwa joined Young Boys in July 2022 from Atletico Lusaka Football Club, where he was on loan from Shamuel Academy.
He spent the majority of his season at the Swiss club acclimating with the reserve team before being promoted to the first squad.
The Zambia Under-23 star made five appearances and provided an assist in the Swiss Super League.
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For winning the league on Sunday, Young Boys have secured a slot in the UEFA Champions League qualifying round.
Chaiwa and his team will now hope to qualify for the Champions League group stage for the fourth time in the club’s history.
Young Boys last competed in the Champions League in the 2021/22 season. They finished bottom in Group F, behind Manchester United, Atalanta, and Villareal.
Chaiwa could become the youngest Zambian to play in the Champions League if Young Boys go past the qualifying round.
He is also expected to make a cut in Chipolopolo coach Avram Grant’s squad for the AFCON qualifiers’ final round in June.