Can awk patterns be dynamically configured with variables?

 echo-e 1 2 3 \\n4 56 \\n789 |
awk $1 == 1, $2 == 2, $3 == 3"

If so, of course you can get line 1 2 3
How can I get patterns if I use variables here?

Specifically
Variables aa="\$1==1,\$2==2,\$3==3" Also include $n and equal sign in the variable.
awk'eval aaa' How can I get the same result as above by doing something like ←?

awk-va1=1,a2=2,a3=3'$1==a1,$2==a2,$3'

I would like to reiterate that it is not as simple as .