You can fill out the questionnaire here: https://ec.europa.eu/info/law/better-regulation/have-your-say/initiatives/14608-European-Research-Area-Act/public-consultation_en
Academic institutions, NGOs, EU- and non-EU citizens, and businesses can all respond.
You can look at the submissions to get an idea of the concerns raised [2]
[1]: "Barriers also remain to the free and open access to publicly funded R&I results" mentioned in the call for evidence https://ec.europa.eu/info/law/better-regulation/have-your-say/initiatives/14608-European-Research-Area-Act_en
[2]: https://ec.europa.eu/info/law/better-regulation/have-your-say/initiatives/14608-European-Research-Area-Act/F3719029_en