One way:
Formula:
=LET(t,A2:B9999,a,INDEX(t,,1),b,INDEX(t,,2),f,FILTER(a,a),u,UNIQUE(f),
HSTACK(u,MAP(u,LAMBDA(x,TEXTJOIN(";",,FILTER(b,a=x))))))
One way:
Formula:
=LET(t,A2:B9999,a,INDEX(t,,1),b,INDEX(t,,2),f,FILTER(a,a),u,UNIQUE(f),
HSTACK(u,MAP(u,LAMBDA(x,TEXTJOIN(";",,FILTER(b,a=x))))))
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