Show working-instructions depending on GHS-hazard-pictograms

Here are my corrected formulas:

Available rooms:

Please try

=LET(
  f,FILTER(Database!B2:U88,ISNUMBER(XMATCH(Database!A2:A88,B4:J4))),
  t,VSTACK(Database!B1:U1,f),
  u,FILTER(t,BYCOL(t,LAMBDA(c,ISNA(XMATCH("No",c))))),
  r,TAKE(u,1),
  z,TRANSPOSE(FILTER(r,r<>0)),
  IFERROR(MAP(z,LAMBDA(x,LET(q,UNIQUE(INDEX(u,,1+XMATCH(x,r))),TEXTJOIN(" , ",,x,XLOOKUP(FILTER(q,q<>"",""),Database!X4:X14,Database!Y4:Y14,""))))),"No rooms available"))

Special requirements:

Please try:

=LET(
f,FILTER(INDEX(Database!V2:W88,,XMATCH(D17,Database!V1:W1)),ISNUMBER(XMATCH(Database!A2:A88,B4:J4))),
IFERROR(MAP(SORT(UNIQUE(TEXTSPLIT(TEXTJOIN(", ",,f),,", "))),LAMBDA(x,x&": "&XLOOKUP(x,'Special Requirements Database'!A2:A99,'Special Requirements Database'!B2:B99))),"-"))