Egyptian President Anwar Sadat yesterday welcomed the Israeli Knesset's overwhelming approval of the peace treaty as "marvelous, marvelous -- this is marvelous, really." But he cautioned that implementing the treaty will involve "lots of problems."

Sadat's mixed reaction mirrored what appeared to be the general mood of the Egyptian people. Except for a few dissenting voices on the extreme left and extreme right, most Egyptians appeared pleased with the Knestiations with Israel to turn the two-nation treaty into a comprehensve Middle East peace.

Egypt said it plans to send a delegation to the West Bank and Gaza after the treaty is signed to try to persuade Palestinians there to go along with the autonomy plan in the accord. Negotiations to set up an autonomous government are supposed to start a month after the signing.

Meanwhile, Arab League foreign ministers are scheduled to meet Tuesday in Baghdad, Irag, to decide on a course of action against Egypt, whom they regard as having agreed to a separate peace with Israel.

But the politically moderate oil-rich nation of Kuwait urged postponing the meeting until early next month because of a previously scheduled summit meeting next Thursday aimed at ending the border conflict between North Yemen and South Yemen. A Palestine Liberation Organization spokesman denounced the request as an attempt to weaken Arab unity.