Is the increase in money deposited in the bank for 14 years, which was allocated by the deceased father's employer, considered usury (riba)? And what should be done with this money?

If the money deposited in a usurious bank is from the remaining rights of the father, it is an inheritance. It is impermissible to take the usurious increase; rather, it must be disposed of in charitable causes, unless there is a need. However, if the money is a gift or a grant from an institution, it is permissible to take it in full, because the sin falls upon the one who placed the money in the usurious bank.