Real estate transactions are allowed and are being held in Ukraine. As for your specific likely case nothing changed significantly since moscow largescale invasion. Attorney-at-law can act on behalf of buyers before the notary and/or state registrator of immovable property at notary certification of a sale-purchase agreement. In general, you and your spouse will have to issue a power of attorney in the Netherlands and send it to Ukraine after the apostille is put on it. You will also make a statement approving you are not a political or criminal person, as well as a source of money for paying for the real estate is not illegal. The sale-purchase agreement may be paid by you by wire transfer to the seller's bank account directly. The legal title of the property on the real estate bought passes to the buyer by special registration in the State Register of immovable property of Ukraine after notarial certification of the sale-purchase agreement. Your traveling to Ukraine is not needed if there is your attorney-at-law authorized as mentioned above.