If it’s important to you that there is historical evidence for a belief in a god, such as a tradition related to a revelation, then the specific versions posited in the past have have been explained away, and that undermines any present reason to believe.
If philosophical arguments about what must be, such as the cosmological argument, are more important to you, then less so because the god believed in is constructed to not be falsified by present known things—but that constructed thing isn’t necessarily unfalsifiable.
Substantially but not entirely.
If it’s important to you that there is historical evidence for a belief in a god, such as a tradition related to a revelation, then the specific versions posited in the past have have been explained away, and that undermines any present reason to believe.
If philosophical arguments about what must be, such as the cosmological argument, are more important to you, then less so because the god believed in is constructed to not be falsified by present known things—but that constructed thing isn’t necessarily unfalsifiable.