The seizure of the Iranian ship complicates the situation. Iran's Revolutionary Guard will respond. Competing narratives exist about talks. The US has a 2-3 week window before markets are affected, while Iran thinks it can sustain the war for 2-3 months to consolidate victories like controlling the Strait of Hormuz. The US President needs a win, especially on nuclear issues.
Iran wants to use its greater time tolerance as leverage to strengthen its negotiating hand, especially as US public opinion is against the war.