At least the last five chapters of Exodus deal with the plans and building of the ark of the tabernacle, the place where God's presence dwelled during the time of Moses (and beyond). In these chapters God tells Moses to take contributions from those men and women whose hearts moved them to contribute to this work. The only people named in this batch of people are the serving women and their offering. Not one other person in all of Israel who gave to the temple is named, is indentified.
Their mirrors, made of bronze, were very likely their most prized possessions. They willingly gave them.
They were only serving women. They were probably overlooked by the people, by the men who went into the tent of meeting, the priests. The people probably had no idea of this contribution. But God told Moses to record it, to make note of it in His word.
Without their offering, their sacrifice Moses and Aaron as priest (and Aaron's sons) couldn't have obeyed God fully.
Änd from it (the laver mentioned above) Moses and Aaron and his sons washed their hands and feet. When they entered the tent of meeting, and when they approached the altar, they washed, just as the LORD had commanded Moses." Exodus 40:31-32
God always sees what we do for Him even if others don't. God sees. Nothing we do for Him is irrelevant. Nothing we do for Him is useless.
Even tasks we do daily, if done for Him, can add to His Kingdom, to His work on this earth. Even dishes and laundry.
There are many who are the pimary caregivers for their children with disabilities or their aging parents or spouses. God sees your devotion to your charge. He sees the love you give them. Do it for Him. Even if it seems you are only touching one other life, it goes far beyond that. The hidden work is sometimes the most important.