Actually they do. It's their main business. Developing and improving lithography tooling for chip production. Russia needs to develop it's own because ASML isn't delivering and or servicing their lithography technology any more, due to embargo restrictions. ASML is decades ahead of any and all competition. Russia can't develop competing technology in the needed time frame. So they are going for cheaper and simpeler chip development. Simply because they have no choice. Russia is currently running on old Lithography tech that isn't serviced bij ASML anymore. They can't keep it running by themselfs. Thats why they are smuggling in western chipsets to keep everything running. Without those western chipsets, Russia would grind to a complete halt. Without ASML there are no smartphones, no electronic appliances, no computers, no cars with advanced electronics, No planes, no missles, no tanks, no factories. 90% of all chips in the entire world are made with tech from ASML, and can't be made without ASML.
Thats also one of the reasons why Trumps comments about Europe beeing a bad business partner is total garbage. Without the Netherlands the US wouldn't and couldn't be the most powerful nation on this planet. Without ASML there would be close to no more electronics in the US.