Actual bidding in diagram. Beside opening 1♥ iso 1♠, what could have been done better?
Suppose the bidding would start (SA, not 2/1!, not (Non-)serious 3NT):
1♠-2♦
3♥-3♠ (does North have enough for 3S?)
..easier with ♠-fit because South can find Norths ♠Q.
Actually East was dealer. At our table East opened 2♣ mini-precision (Weak with ♣, if only 5c♣ then also a 4cMajor):
(2♣)-3♣!-3♦
3♥-4♣
4♦-4♥
4NT-5♣
(DBL)-6♥-AP
Not clear what N-S meant with this bidding (even not after asking them).

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