Several Democrats who opposed Trump's 'big, beautiful bill' died and were not replaced in time, which contributed to the bill's narrow passage.
Democrat seats were empty because they died and weren’t replaced and that is why the big beautiful bill passed

FactVerify
Source: factverify.com
What the Evidence Shows
The claim states that Democrat seats were empty because members died and were not replaced, and that this absence was a reason the 'big beautiful bill' passed. According to the article from The Daily Beast, three Democratic congressmen who would have voted against Trump's spending plan died during the relevant period. Their absence meant fewer votes against the bill, which helped it pass narrowly.
NBC News confirms that the bill passed by a very slim margin on a party-line vote, highlighting tensions within the Democratic Party and the impact of aging leaders. While it is true that the deaths of these Democrats contributed to their absence and thus affected the vote count, it is an oversimplification to say this was the sole reason the bill passed. Other political dynamics and party-line voting also played significant roles.
Therefore, the claim is mostly true but somewhat simplified, as it does not account for all factors involved in the bill's passage.