I’ve never been comfortable trying to constrain God to a 6,000 year box or to a single creation.
The Bible leaves it to us to determine, if we are interested, how long God's first "week" of creation takes; and we've learned very conclusively that our universe is nearly 14 billion years old and our earth 4-1/2 billion. Our duty is not, as you put it, to constrain God but rather to understand and then respond to Him.
Anyone who uses the 6,000 year figure for anything missed, “Concern yourself NOT with ENDLESS geneologies” endless as in NEVER ENDING......as in always existed. Endless