as suggested above by
@Gav. working on getting physically closer to your subject is always going to get your the best results.
Disclaimer - canon bashing coming up (no intention of offending but it is what it is), please don't read if you like canon too much
Canon RF doesn't have any affordable lenses I would consider
usable in UK weather. I barely get by with a 200-600mm at f6.3 at long end and even then its a massive stretch.
The f7.1, f8, f9 and f11 aperture tele-lens might be super in Australia or Africa or shooting polar bears in August in the arctic
but it just doesn't cut it even with latest greatest FF sensors in the UK.
IMO, these lenses are clearly made for a different country or population than those that shoot wildlife in the UK (half which are small/tiny birds sat in tree/bushes with overcast sky!).
R5 is an amazing body with not a single affordable tele-lens I could work with natively (with field craft or no field craft)