Hamas, in an official announcement, welcomes the decision of the UN Security Council and calls on the Security Council to put pressure on Israel so that it is committed to the decision.

More from Hamas’ announcement following the UN Security Council’s decision:
We emphasize the importance of reaching a permanent ceasefire that will lead to the withdrawal of all Zionist forces from the Gaza Strip and the return of the refugees to their homes.

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Hamas is certainly satisfied. If the US thinks that this will pressure Hamas to be flexible towards reaching a deal, then it is wrong.
The decision at the UN will lead to a hardening of positions on the part of Hamas.

Hamas feels that the US also stands by its side in putting pressure on Israel. It has no reason to be flexible in the negotiations.