Stacking Multiple Arrays In Query/Lambda Function - google-sheets

Question

My question was inspired by this post in that I'm wondering if it's possible to create a formula to stack a dynamic amount of arrays based on a list (see below for clarification).
Sample Starting Data From Three Sources
ID
Amount
India
9
Delta
4
Hotel
8
ID
Amount
Alpha
1
Echo
5
Foxtrot
6
ID
Amount
Bravo
2
Gulf
7
Charlie
3
Desired final result:
ID
Amount
Alpha
1
Bravo
2
Charlie
3
Delta
4
Echo
5
Foxtrot
6
Gulf
7
Hotel
8
India
9
I can get the final result by using a query function as shown in this spreadsheet with a formula referencing the appropriate cells with fileID and range:
=Query({IMPORTRANGE(E2,F2);
IMPORTRANGE(E3,F3);
IMPORTRANGE(E4,F4)},"Select * where Col1 is not null order by Col1",1)
if you want to play with it in your own sheet, you could use this hard-coded function which is the same as above:
=Query({IMPORTRANGE("1WtI56_9mhyArMn_j_H4pZg8E0QdIBaKoJfAr-fDAoE0","'Sheet1'!A:B");
IMPORTRANGE("1HamomAuLtwKJiFEtRKTuEkt--YDTtWChUavetBcAcBA","'Sheet1'!A2:B");
IMPORTRANGE("1WtI56_9mhyArMn_j_H4pZg8E0QdIBaKoJfAr-fDAoE0","'Sheet2'!A2:B")},"Select * where Col1 is not null order by Col1",1)
My Question:
Is there a way to leverage a formula to generate this result based on the number of file ids and ranges in columns E and F? So if a fourth ID and range were added, the desired result in columns a and b would be shown? I suspect Lambda would work, but I am not as strong with it as I should be.
Unsuccessful attempt:
=lambda(someIDs,SomeRanges,IMPORTRANGE(someIds,SomeRanges))(filter(E2:E,E2:E<>""),filter(F2:F,F2:F<>""))
REALLY Bad Attempts:
=contact(Player()*1800-CoffeeBribe*Not(Home))
=company(theMaster(emailed)*(false))<>🐇
All helpful answers will be upvoted if not accepted. Thanks.

Answer 1

if ranges would be the same:
=LAMBDA(x, QUERY(REDUCE({"ID", "Amount"}, x,
LAMBDA(a, c, {a; IMPORTRANGE(c, "Sheet1!A2:B")})),
"where Col1 is not null", 1))
(E2:INDEX(E:E, MAX((E:E<>"")*ROW(E:E))))
if ranges are not the same:
=INDEX(LAMBDA(x, y, QUERY(SPLIT(TRANSPOSE(SPLIT(QUERY(MAP(x, y,
LAMBDA(e, f, QUERY("♣"&FLATTEN(QUERY("♥"&TRANSPOSE(
IMPORTRANGE(e, f)),,9^9)),,9^9))),,9^9),
"♣")), "♥"), "where Col1 <> ' ' order by Col2", 1))(
E2:INDEX(E:E, MAX((E:E<>"")*ROW(E:E))),
F2:INDEX(F:F, MAX((F:F<>"")*ROW(F:F)))))
or:
=LAMBDA(x, QUERY(REDUCE({"ID", "Amount"}, x,
LAMBDA(a, b, {a; IMPORTRANGE(b, OFFSET(b,,1))})),
"where Col2 is not null", 1))
(E2:INDEX(E:E, MAX((E:E<>"")*ROW(E:E))))
in old days it would be solved by generating it:
={""; INDEX("={"&TEXTJOIN("; ", 1, "IMPORTRANGE("""&
FILTER(E2:E, E2:E<>"")&""", """&FILTER(F2:F, F2:F<>"")&""")")&"}")}

Answer 2

REDUCE accepts and returns arrays. We can use it to stack ranges. INDEX/COUNTA can be used to get the range needed without blanks. OFFSET can be used to get the next column's value.
=QUERY(
REDUCE(
{"Id","Amount"},
E2:INDEX(E2:E,COUNTA(E2:E)),
LAMBDA(
a,e,
{a;IMPORTRANGE(e,OFFSET(e,0,1))}
)
),
"Select * where Col1 is not null order by Col1",
1
)