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There is HRT for men. An old colleague of mine was prescribed TRT on the NHS in his 20s,as his was naturally very low.
What you wont get prescribed is HRT for normal age related declines in testosterone production. As per further up the thread , there are many private clinics that offer testosterone therapy, but there's a lot of very dubious companies and products in that space .
As already mentioned by a few , there's plenty to do to help yourself before looking to medical solutions
If you're concerned, you can get your bloods done for around £100 AFAIK.
Test boosters are an industry rife with snake oil. Be careful. The best things for testosterone are generally just things that are good for life. Good sleep, low stress, not too much booze, balanced diet.