Welcome to Numista!
These are not Kushan. They are examples of the famous “bull & horseman” billon jitals from northern historical India (including parts of Pakistan and Afghanistan). Millions of these were made, generally between 900-1300 AD, by numerous rulers, in dozens of varieties. It is often difficult to determine the variety. Here are a few good sources of information.
http://www.forumancientcoins.com/dougsmith/bh.html
https://www.coincommunity.com/forum/topic.asp?TOPIC_ID=267786
https://en.numista.com/catalogue/index.php?mode=simplifie&p=1&l=&r=bull+horseman+jital&e=&d=&ru=&i=&ca=3&no=&se=&v=&m=&a=&t=&dg=&w=&u=&f=&g=&c=&wi=&sw=&tb=y&tc=y&tn=y&tp=y&tt=y&cat=y&ct=coin
Robert Tye’s book Jitals is also a great resource. The illustration pages from it are available as a free .pdf download (with registration) from https://www.academia.edu/356700/Jitals
With the coins in hand it might be possible for you to determine the varieties.
It's always a good idea when asking for ID to include the weight to the nearest tenth of a gram and the diameter to the nearest mm. Bull & horseman jitals should generally be in the range of about 2.8-4 grams and approximately 13-16 mm diameter.