Your first job is ALWAYS going to be the hardest for you to get, so don’t let it get you down.
I graduated in 2018 (BSc in Biomedical Science) and decided to go into teaching, which wasted two years as I absolutely hated it (I got experience but nothing outside of placement). Officially I didn’t start my first job in healthcare until Jan 2021 and worked in that trust for 3 years (2021-2023) before leaving to do my MSc (my first job was a Band 2 MLA role in the NHS (couldn’t get a lower paid job) but showed I could do the higher band jobs and was promoted to a Band 4 within 6 months).
I don’t know where you’ve applied for but consider applying for the entry level jobs (even if minimum wage) and go from there, you’ll get there eventually!
If you mind me asking, have you had any luck with interviews?