No, your EU rights continue to exist. Now that the transition period has ended, the UKIPO has automatically created equivalent UK trade marks for all EU trade marks that were registered (i.e. granted) before the end of 2020, and no action is required on your part. These equivalent marks retain the filing dates of the original EU trade marks, and also retain any priority and/or seniority dates. Of course, your EU trade marks continue to exist as normal, with the only difference being that they will now cover the remaining 27 EU Member States, and not the UK.
The same has happened with EU registered designs – they have automatically been granted an equivalent UK national right. There should be no re-examination of any equivalent UK national rights (trade marks or designs) created under these provisions.