Lawmakers in both parties on Thursday called on a congressional panel to release the results of an investigation into alleged misconduct by former Representative Matt Gaetz of Florida, demanding to see its report about sexual misconduct and other charges against President-elect Donald J. Trump’s pick to be the attorney general.

Mr. Gaetz abruptly resigned on Wednesday after Mr. Trump announced he was the pick to lead the Justice Department, shocking many members of Congress who see him as unqualified and unfit for the post. His rapid exit effectively ended the ethics panel’s investigation into him two days before members had planned to vote on whether to release their long-awaited findings.

Since the spring of 2021, the House Ethics Committee has been investigating claims that Mr. Gaetz engaged in sexual misconduct and illicit drug use, shared inappropriate images or videos on the House floor, misused state identification records, converted campaign funds to personal use and accepted impermissible gifts under House rules, among other charges.

Senator Dick Durbin, the Illinois Democrat who chairs the Judiciary Committee, which would have jurisdiction over confirming an attorney general, on Thursday called on the House panel to preserve and share its conclusions.

“The sequence and timing of Mr. Gaetz’s resignation from the House raises serious questions about the contents of the House Ethics Committee report,” Mr. Durbin said in a statement. “We cannot allow this valuable information from a bipartisan investigation to be hidden from the American people.”

Representative Michael Guest, Republican of Mississippi and the chairman of the Ethics Committee, suggested in comments to reporters that he was not inclined to release the investigative findings now that Mr. Gaetz has resigned.