If a team shows up late, the rules in section A5 and A7.3 of the Appendix apply, especially A5.2.2 which says if one team isn’t present, the team that is present gets to make the choices about O/D and end zones.
If a team takes too long between points, the opposition can call a violation as per section A5.4 of the Appendix.
https://rules.wfdf.org/documents/wfdf-rules-of-ultimate-2021-2024-appendix-v2-0/download