Normally in a Mass location where there is no tabernacle all the Precious Body is consumed, so the faithful and the priest and deacon would continue consuming, if there are “extras”, until all are gone.
Some places will have a plate on a table at the entrance with hosts and another plate next to it. When one enters one moves a host into the “empty” dish. Then only the hosts in that plate are brought forward as the gifts, as a means of controlling the number of hosts consecrated to best match the number of those receiving. This is usually done in a small group like a retreat, even if there is a tabernacle.
(The preference is that we always are consuming the Precious Body that was consecrated in the Mass we are attending, and not consuming those previously consecrated and brought up from the tabernacle. Many places this however is not followed. GIRM 85. It is most desirable that the faithful, just as the priest himself is bound to do, receive the Lord’s Body from hosts consecrated at the same Mass and that, in the instances when it is permitted, they partake of the chalice, so that even by means of the signs Communion will stand out more clearly as a participation in the sacrifice actually being celebrated.)