Are tribulation saints part of the general resurrection?
No, tribulation saints are not part of the general resurrection. The context explains they will be in a separate resurrection or a translation, distinct from the lost, the Old Testament saints in Daniel's company, and the church-age believers who form the body of Christ.
Les explains that every person resurrected falls into one of three groups: the lost, Daniel's company (Old Testament saints), or the company of believers Paul describes as the body of Christ. He then notes that tribulation saints are not in a general resurrection; they will have a separate resurrection or translation. Les also qualifies the first resurrection: it includes the firstfruits (those who arose at Jerusalem and Christ Himself), the main harvest (church-age believers), and the Old Testament saints who appear after the kingdom begins, likened to wedding guests at the marriage supper of the Lamb. The lost are not resurrected until after the kingdom ends.