I would ask the "Bible Only" Christians to explain what the Epiousios, the fourth petition in the Lord's Prayer is, if not the Eucharist.
The everyday provision of our needs of life.
It is also a petition that God take care of our daily needs. To quote from the Lutheran Small Catechism: Give us this day our daily bread.
What does this mean?--Answer.
God gives daily bread, even without our prayer, to all wicked men; but we pray in this petition that He would lead us to know it, and to receive our daily bread with thanksgiving.
What is meant by daily bread?--Answer.
Everything that belongs to the support and wants of the body, such as meat, drink, clothing, shoes, house, homestead, field, cattle, money, goods, a pious spouse, pious children, pious servants, pious and faithful magistrates good government, good weather, peace, health, discipline, honor, good friends, faithful neighbors, and the like.
Of course, this can have more than one meaning. We need both our daily bodily needs and spiritual needs met, and only the Father can provide them. He has through the merits of His Son, Jesus Christ, and not our merits.