Here are links to the research pages of the various European Wide Organisations that represent various different modalities of psychotherapy

European Association of Body Psychotherapy (EABP) ‘Research’:

www.eabp.org/research.php

European Association of Biosynthesis:

(no research page)

European Association of Gestalt Therapy (EAGT): ‘Research‘:

www.eagt.org/joomla/index.php/component/search/?searchword=research

European Association for Hypno Psychotherapy (EAHP):

www.hypno-psychotherapy.com

European Association for Integrative Psychotherapy (EAIP):

www.euroaip.eu/about-eaip/research-and-publications/

European Association for Concentrative Movement Therapy: (EAKBT)

www.dakbt.de/forschung/studien-der-forschungsgruppe eanlpt.org/Research

European Association for Neurolinguistic Programming (EANLPt):

eanlpt.org/Research

European Association for Psycho-Organic Analysis (EAPOA):

(no research page)

European Association for Reality Therapy (EART):

www.realitytherapy-europe.org/index.php/research

European Association for Transactional Analysis (EATA):

www.eatanews.org/eata-2/comittees/research-activities/research-articles/

European Confederation of Psychoanalytic Psychotherapies (ECPP):

(no research page)

European Federation of Bioenergetic-Analysis Psychotherapy (EFB-AP):

www.bioenergeticanalysis.net/whatisbaeng.html

European Federation of Centres for Positive Psychotherapy (EFCPP):

www.positum.org/52-0-Research.html

European Federation for Psychosynthesis Psychotherapy (EFPP):

(no research page)

European Family Therapy Association (EFTA):

www.europeanfamilytherapy.eu/efta-community-news/

Federation of European Psychodrama Training Organisation (FEPTO):

www.fepto.com/organization/scientific-validation-of-psychodrama-therapy

European Network for Person-Centred and Experiential Psychotherapy and Counselling (PCE Europe):

https://pce-literature.org/en and type in "research"