Yes, that's what SEPIC means... see
https://en.wikipedia.org/wiki/Single-ended_primary-inductor_converterSEPIC converters are noticeable by the presence of two separate inductors, or by an inductor with two windings.
Something else you should consider... if you don't care about efficiency when it comes to usb power or heat, you could just use a cheap LDO to get the voltage down to something below 3.3v but above what you'd typically have with batteries, and then simply use a cheaper step-up regulator.
For example, 2.8v , 3.0v , 3.3v are standard voltages and there's tens of thousand LDOs out there with these preset outputs ... if you use two rechargeable AA batteries you'd have up to 2.7v (1.35v x 2) .. alkaline batteries are up to around 1.65v, so 3.2v max
For example, MIC5504-3.3 is 10-11 cents each and can do up to 300mA :
https://www.digikey.com/product-detail/en/microchip-technology/MIC5504-3.3YM5-TR/576-4764-1-ND/4864028Same for MIC5501-3 which outputs 3v at up to 300mA :
https://www.digikey.com/product-detail/en/microchip-technology/MIC5501-3.0YM5-TR/576-4905-1-ND/5277876Here's a whole lot of them :
https://www.digikey.com/short/pp82czSo once you know you have 3.3v or less no matter the source, you can focus on using a step-up / boost regulator only ... and your parameters are less than 3.3v input, probably minimum 1.8v or thereabouts, 3.3v output , around 200mA of current ...
Here's a starting point ... all switching regulators that can start with less than 2v and output at least 250mA of current, sorted by price @ 25pcs :
https://www.digikey.com/short/pp82twSo you have for example MCP1640 at 50 cents @ 25pcs
https://www.digikey.com/product-detail/en/microchip-technology/MCP1640T-I-CHY/MCP1640T-I-CHYCT-ND/2258621which can do 0.8v ..5.5v step-up to 5.5v 350mA , sync rectifier so no need for diodes...
• Up to 96% Typical Efficiency
• 800 mA Typical Peak Input Current Limit:
-IOUT > 100 mA @ 1.2V VIN, 3.3V VOUT
-IOUT > 350 mA @ 2.4V VIN, 3.3V VOUT
-IOUT > 350 mA @ 3.3V VIN, 5.0V VOUT
Or TPS61322 , 75 cents @ 10pcs, 58 cents @ 100pcs :
https://www.digikey.com/product-detail/en/texas-instruments/TPS613221ADBVR/296-50502-1-ND/96856410.9v to 5.5v in, it will do 200mA from 1.5v and up
So basically the overall cost would be less than 1$ but the downside is that the LDO will dissipate some heat taking 5v from USB down to 3.3v or less... at around 250mA, we're talking (5v-3.3v) x0.25a= 0.425 A .. it's not a big amount.