You may try this formula:
=LET(a;FILTER(TOCOL(F2:F;1);TOCOL(E2:E;1)=A2);b;COUNTUNIQUE(BYROW(a;LAMBDA(x;XLOOKUP(x;TOCOL(H2:H;1);TOCOL(I2:I;1)))));c;JOIN(";";a);HSTACK(b;c))
Output: